app/src/main/java/com/stoutner/privacybrowser/activities/MainWebViewActivity.java

   1 /*
   2  * Copyright © 2015-2021 Soren Stoutner <soren@stoutner.com>.
   3  *
   4  * Download cookie code contributed 2017 Hendrik Knackstedt.  Copyright assigned to Soren Stoutner <soren@stoutner.com>.
   5  *
   6  * This file is part of Privacy Browser <https://www.stoutner.com/privacy-browser>.
   7  *
   8  * Privacy Browser is free software: you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation, either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * Privacy Browser is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with Privacy Browser.  If not, see <http://www.gnu.org/licenses/>.
  20  */
  21
  22 package com.stoutner.privacybrowser.activities;
  23
  24 import android.annotation.SuppressLint;
  25 import android.app.Activity;
  26 import android.app.Dialog;
  27 import android.app.DownloadManager;
  28 import android.app.SearchManager;
  29 import android.content.ActivityNotFoundException;
  30 import android.content.BroadcastReceiver;
  31 import android.content.ClipData;
  32 import android.content.ClipboardManager;
  33 import android.content.Context;
  34 import android.content.Intent;
  35 import android.content.IntentFilter;
  36 import android.content.SharedPreferences;
  37 import android.content.pm.PackageManager;
  38 import android.content.res.Configuration;
  39 import android.database.Cursor;
  40 import android.graphics.Bitmap;
  41 import android.graphics.BitmapFactory;
  42 import android.graphics.Typeface;
  43 import android.graphics.drawable.BitmapDrawable;
  44 import android.graphics.drawable.Drawable;
  45 import android.net.Uri;
  46 import android.net.http.SslCertificate;
  47 import android.net.http.SslError;
  48 import android.os.AsyncTask;
  49 import android.os.Build;
  50 import android.os.Bundle;
  51 import android.os.Environment;
  52 import android.os.Handler;
  53 import android.os.Message;
  54 import android.preference.PreferenceManager;
  55 import android.print.PrintDocumentAdapter;
  56 import android.print.PrintManager;
  57 import android.provider.DocumentsContract;
  58 import android.text.Editable;
  59 import android.text.Spanned;
  60 import android.text.TextWatcher;
  61 import android.text.style.ForegroundColorSpan;
  62 import android.util.Patterns;
  63 import android.util.TypedValue;
  64 import android.view.ContextMenu;
  65 import android.view.GestureDetector;
  66 import android.view.KeyEvent;
  67 import android.view.Menu;
  68 import android.view.MenuItem;
  69 import android.view.MotionEvent;
  70 import android.view.View;
  71 import android.view.ViewGroup;
  72 import android.view.WindowManager;
  73 import android.view.inputmethod.InputMethodManager;
  74 import android.webkit.CookieManager;
  75 import android.webkit.HttpAuthHandler;
  76 import android.webkit.SslErrorHandler;
  77 import android.webkit.ValueCallback;
  78 import android.webkit.WebBackForwardList;
  79 import android.webkit.WebChromeClient;
  80 import android.webkit.WebResourceResponse;
  81 import android.webkit.WebSettings;
  82 import android.webkit.WebStorage;
  83 import android.webkit.WebView;
  84 import android.webkit.WebViewClient;
  85 import android.webkit.WebViewDatabase;
  86 import android.widget.ArrayAdapter;
  87 import android.widget.CheckBox;
  88 import android.widget.CursorAdapter;
  89 import android.widget.EditText;
  90 import android.widget.FrameLayout;
  91 import android.widget.ImageView;
  92 import android.widget.LinearLayout;
  93 import android.widget.ListView;
  94 import android.widget.ProgressBar;
  95 import android.widget.RadioButton;
  96 import android.widget.RelativeLayout;
  97 import android.widget.TextView;
  98
  99 import androidx.annotation.NonNull;
 100 import androidx.appcompat.app.ActionBar;
 101 import androidx.appcompat.app.ActionBarDrawerToggle;
 102 import androidx.appcompat.app.AppCompatActivity;
 103 import androidx.appcompat.app.AppCompatDelegate;
 104 import androidx.appcompat.widget.Toolbar;
 105 import androidx.coordinatorlayout.widget.CoordinatorLayout;
 106 import androidx.core.content.res.ResourcesCompat;
 107 import androidx.core.view.GravityCompat;
 108 import androidx.drawerlayout.widget.DrawerLayout;
 109 import androidx.fragment.app.DialogFragment;
 110 import androidx.swiperefreshlayout.widget.SwipeRefreshLayout;
 111 import androidx.viewpager.widget.ViewPager;
 112 import androidx.webkit.WebSettingsCompat;
 113 import androidx.webkit.WebViewFeature;
 114
 115 import com.google.android.material.appbar.AppBarLayout;
 116 import com.google.android.material.floatingactionbutton.FloatingActionButton;
 117 import com.google.android.material.navigation.NavigationView;
 118 import com.google.android.material.snackbar.Snackbar;
 119 import com.google.android.material.tabs.TabLayout;
 120
 121 import com.stoutner.privacybrowser.BuildConfig;
 122 import com.stoutner.privacybrowser.R;
 123 import com.stoutner.privacybrowser.adapters.WebViewPagerAdapter;
 124 import com.stoutner.privacybrowser.asynctasks.GetHostIpAddresses;
 125 import com.stoutner.privacybrowser.asynctasks.PopulateBlocklists;
 126 import com.stoutner.privacybrowser.asynctasks.PrepareSaveDialog;
 127 import com.stoutner.privacybrowser.asynctasks.SaveUrl;
 128 import com.stoutner.privacybrowser.asynctasks.SaveWebpageImage;
 129 import com.stoutner.privacybrowser.dialogs.AdConsentDialog;
 130 import com.stoutner.privacybrowser.dialogs.CreateBookmarkDialog;
 131 import com.stoutner.privacybrowser.dialogs.CreateBookmarkFolderDialog;
 132 import com.stoutner.privacybrowser.dialogs.CreateHomeScreenShortcutDialog;
 133 import com.stoutner.privacybrowser.dialogs.EditBookmarkFolderDialog;
 134 import com.stoutner.privacybrowser.dialogs.FontSizeDialog;
 135 import com.stoutner.privacybrowser.dialogs.HttpAuthenticationDialog;
 136 import com.stoutner.privacybrowser.dialogs.OpenDialog;
 137 import com.stoutner.privacybrowser.dialogs.ProxyNotInstalledDialog;
 138 import com.stoutner.privacybrowser.dialogs.PinnedMismatchDialog;
 139 import com.stoutner.privacybrowser.dialogs.SaveWebpageDialog;
 140 import com.stoutner.privacybrowser.dialogs.SslCertificateErrorDialog;
 141 import com.stoutner.privacybrowser.dialogs.UrlHistoryDialog;
 142 import com.stoutner.privacybrowser.dialogs.ViewSslCertificateDialog;
 143 import com.stoutner.privacybrowser.dialogs.WaitingForProxyDialog;
 144 import com.stoutner.privacybrowser.fragments.WebViewTabFragment;
 145 import com.stoutner.privacybrowser.helpers.AdHelper;
 146 import com.stoutner.privacybrowser.helpers.BlocklistHelper;
 147 import com.stoutner.privacybrowser.helpers.BookmarksDatabaseHelper;
 148 import com.stoutner.privacybrowser.helpers.DomainsDatabaseHelper;
 149 import com.stoutner.privacybrowser.helpers.ProxyHelper;
 150 import com.stoutner.privacybrowser.views.NestedScrollWebView;
 151
 152 import java.io.ByteArrayInputStream;
 153 import java.io.ByteArrayOutputStream;
 154 import java.io.File;
 155 import java.io.FileInputStream;
 156 import java.io.FileOutputStream;
 157 import java.io.IOException;
 158 import java.io.InputStream;
 159 import java.io.OutputStream;
 160 import java.io.UnsupportedEncodingException;
 161
 162 import java.net.MalformedURLException;
 163 import java.net.URL;
 164 import java.net.URLDecoder;
 165 import java.net.URLEncoder;
 166
 167 import java.text.NumberFormat;
 168
 169 import java.util.ArrayList;
 170 import java.util.Calendar;
 171 import java.util.Date;
 172 import java.util.HashMap;
 173 import java.util.HashSet;
 174 import java.util.List;
 175 import java.util.Map;
 176 import java.util.Objects;
 177 import java.util.Set;
 178 import java.util.concurrent.ExecutorService;
 179 import java.util.concurrent.Executors;
 180
 181 public class MainWebViewActivity extends AppCompatActivity implements CreateBookmarkDialog.CreateBookmarkListener, CreateBookmarkFolderDialog.CreateBookmarkFolderListener,
 182         EditBookmarkFolderDialog.EditBookmarkFolderListener, FontSizeDialog.UpdateFontSizeListener, NavigationView.OnNavigationItemSelectedListener, OpenDialog.OpenListener,
 183         PinnedMismatchDialog.PinnedMismatchListener, PopulateBlocklists.PopulateBlocklistsListener, SaveWebpageDialog.SaveWebpageListener, UrlHistoryDialog.NavigateHistoryListener,
 184         WebViewTabFragment.NewTabListener {
 185
 186     // The executor service handles background tasks.  It is accessed from `ViewSourceActivity`.
 187     public static ExecutorService executorService = Executors.newFixedThreadPool(4);
 188
 189     // `orbotStatus` is public static so it can be accessed from `OrbotProxyHelper`.  It is also used in `onCreate()`, `onResume()`, and `applyProxy()`.
 190     public static String orbotStatus = "unknown";
 191
 192     // The WebView pager adapter is accessed from `HttpAuthenticationDialog`, `PinnedMismatchDialog`, and `SslCertificateErrorDialog`.  It is also used in `onCreate()`, `onResume()`, and `addTab()`.
 193     public static WebViewPagerAdapter webViewPagerAdapter;
 194
 195     // `restartFromBookmarksActivity` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onRestart()`.
 196     public static boolean restartFromBookmarksActivity;
 197
 198     // `currentBookmarksFolder` is public static so it can be accessed from `BookmarksActivity`.  It is also used in `onCreate()`, `onBackPressed()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`,
 199     // `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
 200     public static String currentBookmarksFolder;
 201
 202     // The user agent constants are public static so they can be accessed from `SettingsFragment`, `DomainsActivity`, and `DomainSettingsFragment`.
 203     public final static int UNRECOGNIZED_USER_AGENT = -1;
 204     public final static int SETTINGS_WEBVIEW_DEFAULT_USER_AGENT = 1;
 205     public final static int SETTINGS_CUSTOM_USER_AGENT = 12;
 206     public final static int DOMAINS_SYSTEM_DEFAULT_USER_AGENT = 0;
 207     public final static int DOMAINS_WEBVIEW_DEFAULT_USER_AGENT = 2;
 208     public final static int DOMAINS_CUSTOM_USER_AGENT = 13;
 209
 210     // Define the start activity for result request codes.  The public static entries are accessed from `OpenDialog()` and `SaveWebpageDialog()`.
 211     private final int BROWSE_FILE_UPLOAD_REQUEST_CODE = 0;
 212     public final static int BROWSE_OPEN_REQUEST_CODE = 1;
 213     public final static int BROWSE_SAVE_WEBPAGE_REQUEST_CODE = 2;
 214
 215     // The proxy mode is public static so it can be accessed from `ProxyHelper()`.
 216     // It is also used in `onRestart()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `applyAppSettings()`, and `applyProxy()`.
 217     // It will be updated in `applyAppSettings()`, but it needs to be initialized here or the first run of `onPrepareOptionsMenu()` crashes.
 218     public static String proxyMode = ProxyHelper.NONE;
 219
 220     // Define the saved instance state constants.
 221     private final String SAVED_STATE_ARRAY_LIST = "saved_state_array_list";
 222     private final String SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST = "saved_nested_scroll_webview_state_array_list";
 223     private final String SAVED_TAB_POSITION = "saved_tab_position";
 224     private final String PROXY_MODE = "proxy_mode";
 225
 226     // Define the saved instance state variables.
 227     private ArrayList<Bundle> savedStateArrayList;
 228     private ArrayList<Bundle> savedNestedScrollWebViewStateArrayList;
 229     private int savedTabPosition;
 230     private String savedProxyMode;
 231
 232     // Define the class variables.
 233     @SuppressWarnings("rawtypes")
 234     AsyncTask populateBlocklists;
 235
 236     // The current WebView is used in `onCreate()`, `onPrepareOptionsMenu()`, `onOptionsItemSelected()`, `onNavigationItemSelected()`, `onRestart()`, `onCreateContextMenu()`, `findPreviousOnPage()`,
 237     // `findNextOnPage()`, `closeFindOnPage()`, `loadUrlFromTextBox()`, `onSslMismatchBack()`, `applyProxy()`, and `applyDomainSettings()`.
 238     private NestedScrollWebView currentWebView;
 239
 240     // `customHeader` is used in `onCreate()`, `onOptionsItemSelected()`, `onCreateContextMenu()`, and `loadUrl()`.
 241     private final Map<String, String> customHeaders = new HashMap<>();
 242
 243     // The search URL is set in `applyAppSettings()` and used in `onNewIntent()`, `loadUrlFromTextBox()`, `initializeApp()`, and `initializeWebView()`.
 244     private String searchURL;
 245
 246     // The blocklists are populated in `finishedPopulatingBlocklists()` and accessed from `initializeWebView()`.
 247     private ArrayList<List<String[]>> easyList;
 248     private ArrayList<List<String[]>> easyPrivacy;
 249     private ArrayList<List<String[]>> fanboysAnnoyanceList;
 250     private ArrayList<List<String[]>> fanboysSocialList;
 251     private ArrayList<List<String[]>> ultraList;
 252     private ArrayList<List<String[]>> ultraPrivacy;
 253
 254     // Declare the class variables
 255     private BroadcastReceiver orbotStatusBroadcastReceiver;
 256     private String webViewDefaultUserAgent;
 257     private boolean incognitoModeEnabled;
 258     private boolean fullScreenBrowsingModeEnabled;
 259     private boolean inFullScreenBrowsingMode;
 260     private boolean downloadWithExternalApp;
 261     private boolean hideAppBar;
 262     private boolean scrollAppBar;
 263     private boolean bottomAppBar;
 264     private boolean loadingNewIntent;
 265     private boolean reapplyDomainSettingsOnRestart;
 266     private boolean reapplyAppSettingsOnRestart;
 267     private boolean displayingFullScreenVideo;
 268     private boolean waitingForProxy;
 269
 270     // The action bar drawer toggle is initialized in `onCreate()` and used in `onResume()`.
 271     private ActionBarDrawerToggle actionBarDrawerToggle;
 272
 273     // The color spans are used in `onCreate()` and `highlightUrlText()`.
 274     private ForegroundColorSpan redColorSpan;
 275     private ForegroundColorSpan initialGrayColorSpan;
 276     private ForegroundColorSpan finalGrayColorSpan;
 277
 278     // `bookmarksDatabaseHelper` is used in `onCreate()`, `onDestroy`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`,
 279     // and `loadBookmarksFolder()`.
 280     private BookmarksDatabaseHelper bookmarksDatabaseHelper;
 281
 282     // `bookmarksCursor` is used in `onDestroy()`, `onOptionsItemSelected()`, `onCreateBookmark()`, `onCreateBookmarkFolder()`, `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
 283     private Cursor bookmarksCursor;
 284
 285     // `bookmarksCursorAdapter` is used in `onCreateBookmark()`, `onCreateBookmarkFolder()` `onSaveEditBookmark()`, `onSaveEditBookmarkFolder()`, and `loadBookmarksFolder()`.
 286     private CursorAdapter bookmarksCursorAdapter;
 287
 288     // `oldFolderNameString` is used in `onCreate()` and `onSaveEditBookmarkFolder()`.
 289     private String oldFolderNameString;
 290
 291     // `fileChooserCallback` is used in `onCreate()` and `onActivityResult()`.
 292     private ValueCallback<Uri[]> fileChooserCallback;
 293
 294     // The default progress view offsets are set in `onCreate()` and used in `initializeWebView()`.
 295     private int appBarHeight;
 296     private int defaultProgressViewStartOffset;
 297     private int defaultProgressViewEndOffset;
 298
 299     // The URL sanitizers are set in `applyAppSettings()` and used in `sanitizeUrl()`.
 300     private boolean sanitizeGoogleAnalytics;
 301     private boolean sanitizeFacebookClickIds;
 302     private boolean sanitizeTwitterAmpRedirects;
 303
 304     // Define the class variables.
 305     private long lastScrollUpdate = 0;
 306
 307     // Declare the class views.
 308     private FrameLayout rootFrameLayout;
 309     private DrawerLayout drawerLayout;
 310     private RelativeLayout mainContentRelativeLayout;
 311     private AppBarLayout appBarLayout;
 312     private Toolbar toolbar;
 313     private RelativeLayout urlRelativeLayout;
 314     private EditText urlEditText;
 315     private ActionBar actionBar;
 316     private LinearLayout findOnPageLinearLayout;
 317     private LinearLayout tabsLinearLayout;
 318     private TabLayout tabLayout;
 319     private SwipeRefreshLayout swipeRefreshLayout;
 320     private ViewPager webViewPager;
 321     private FrameLayout fullScreenVideoFrameLayout;
 322
 323     // Declare the class menus.
 324     private Menu optionsMenu;
 325
 326     // Declare the class menu items.
 327     private MenuItem navigationBackMenuItem;
 328     private MenuItem navigationForwardMenuItem;
 329     private MenuItem navigationHistoryMenuItem;
 330     private MenuItem navigationRequestsMenuItem;
 331     private MenuItem optionsPrivacyMenuItem;
 332     private MenuItem optionsRefreshMenuItem;
 333     private MenuItem optionsCookiesMenuItem;
 334     private MenuItem optionsDomStorageMenuItem;
 335     private MenuItem optionsSaveFormDataMenuItem;
 336     private MenuItem optionsClearDataMenuItem;
 337     private MenuItem optionsClearCookiesMenuItem;
 338     private MenuItem optionsClearDomStorageMenuItem;
 339     private MenuItem optionsClearFormDataMenuItem;
 340     private MenuItem optionsBlocklistsMenuItem;
 341     private MenuItem optionsEasyListMenuItem;
 342     private MenuItem optionsEasyPrivacyMenuItem;
 343     private MenuItem optionsFanboysAnnoyanceListMenuItem;
 344     private MenuItem optionsFanboysSocialBlockingListMenuItem;
 345     private MenuItem optionsUltraListMenuItem;
 346     private MenuItem optionsUltraPrivacyMenuItem;
 347     private MenuItem optionsBlockAllThirdPartyRequestsMenuItem;
 348     private MenuItem optionsProxyMenuItem;
 349     private MenuItem optionsProxyNoneMenuItem;
 350     private MenuItem optionsProxyTorMenuItem;
 351     private MenuItem optionsProxyI2pMenuItem;
 352     private MenuItem optionsProxyCustomMenuItem;
 353     private MenuItem optionsUserAgentMenuItem;
 354     private MenuItem optionsUserAgentPrivacyBrowserMenuItem;
 355     private MenuItem optionsUserAgentWebViewDefaultMenuItem;
 356     private MenuItem optionsUserAgentFirefoxOnAndroidMenuItem;
 357     private MenuItem optionsUserAgentChromeOnAndroidMenuItem;
 358     private MenuItem optionsUserAgentSafariOnIosMenuItem;
 359     private MenuItem optionsUserAgentFirefoxOnLinuxMenuItem;
 360     private MenuItem optionsUserAgentChromiumOnLinuxMenuItem;
 361     private MenuItem optionsUserAgentFirefoxOnWindowsMenuItem;
 362     private MenuItem optionsUserAgentChromeOnWindowsMenuItem;
 363     private MenuItem optionsUserAgentEdgeOnWindowsMenuItem;
 364     private MenuItem optionsUserAgentInternetExplorerOnWindowsMenuItem;
 365     private MenuItem optionsUserAgentSafariOnMacosMenuItem;
 366     private MenuItem optionsUserAgentCustomMenuItem;
 367     private MenuItem optionsSwipeToRefreshMenuItem;
 368     private MenuItem optionsWideViewportMenuItem;
 369     private MenuItem optionsDisplayImagesMenuItem;
 370     private MenuItem optionsDarkWebViewMenuItem;
 371     private MenuItem optionsFontSizeMenuItem;
 372     private MenuItem optionsAddOrEditDomainMenuItem;
 373
 374     @Override
 375     // Remove the warning about needing to override `performClick()` when using an `OnTouchListener` with `WebView`.
 376     @SuppressLint("ClickableViewAccessibility")
 377     protected void onCreate(Bundle savedInstanceState) {
 378         // Run the default commands.
 379         super.onCreate(savedInstanceState);
 380
 381         // Check to see if the activity has been restarted.
 382         if (savedInstanceState != null) {
 383             // Store the saved instance state variables.
 384             savedStateArrayList = savedInstanceState.getParcelableArrayList(SAVED_STATE_ARRAY_LIST);
 385             savedNestedScrollWebViewStateArrayList = savedInstanceState.getParcelableArrayList(SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST);
 386             savedTabPosition = savedInstanceState.getInt(SAVED_TAB_POSITION);
 387             savedProxyMode = savedInstanceState.getString(PROXY_MODE);
 388         }
 389
 390         // Initialize the default preference values the first time the program is run.  `false` keeps this command from resetting any current preferences back to default.
 391         PreferenceManager.setDefaultValues(this, R.xml.preferences, false);
 392
 393         // Get a handle for the shared preferences.
 394         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 395
 396         // Get the preferences.
 397         String appTheme = sharedPreferences.getString("app_theme", getString(R.string.app_theme_default_value));
 398         boolean allowScreenshots = sharedPreferences.getBoolean(getString(R.string.allow_screenshots_key), false);
 399         bottomAppBar = sharedPreferences.getBoolean(getString(R.string.bottom_app_bar_key), false);
 400
 401         // Get the theme entry values string array.
 402         String[] appThemeEntryValuesStringArray = getResources().getStringArray(R.array.app_theme_entry_values);
 403
 404         // Set the app theme according to the preference.  A switch statement cannot be used because the theme entry values string array is not a compile time constant.
 405         if (appTheme.equals(appThemeEntryValuesStringArray[1])) {  // The light theme is selected.
 406             // Apply the light theme.
 407             AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO);
 408         } else if (appTheme.equals(appThemeEntryValuesStringArray[2])) {  // The dark theme is selected.
 409             // Apply the dark theme.
 410             AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_YES);
 411         } else {  // The system default theme is selected.
 412             if (Build.VERSION.SDK_INT >= 28) {  // The system default theme is supported.
 413                 // Follow the system default theme.
 414                 AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM);
 415             } else {  // The system default theme is not supported.
 416                 // Follow the battery saver mode.
 417                 AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_AUTO_BATTERY);
 418             }
 419         }
 420
 421         // Disable screenshots if not allowed.
 422         if (!allowScreenshots) {
 423             getWindow().addFlags(WindowManager.LayoutParams.FLAG_SECURE);
 424         }
 425
 426         // Enable the drawing of the entire webpage.  This makes it possible to save a website image.  This must be done before anything else happens with the WebView.
 427         if (Build.VERSION.SDK_INT >= 21) {
 428             WebView.enableSlowWholeDocumentDraw();
 429         }
 430
 431         // Set the theme.
 432         setTheme(R.style.PrivacyBrowser);
 433
 434         // Set the content view.
 435         if (bottomAppBar) {
 436             setContentView(R.layout.main_framelayout_bottom_appbar);
 437         } else {
 438             setContentView(R.layout.main_framelayout_top_appbar);
 439         }
 440
 441         // Get handles for the views.
 442         rootFrameLayout = findViewById(R.id.root_framelayout);
 443         drawerLayout = findViewById(R.id.drawerlayout);
 444         mainContentRelativeLayout = findViewById(R.id.main_content_relativelayout);
 445         appBarLayout = findViewById(R.id.appbar_layout);
 446         toolbar = findViewById(R.id.toolbar);
 447         findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
 448         tabsLinearLayout = findViewById(R.id.tabs_linearlayout);
 449         tabLayout = findViewById(R.id.tablayout);
 450         swipeRefreshLayout = findViewById(R.id.swiperefreshlayout);
 451         webViewPager = findViewById(R.id.webviewpager);
 452         fullScreenVideoFrameLayout = findViewById(R.id.full_screen_video_framelayout);
 453
 454         // Get a handle for the navigation view.
 455         NavigationView navigationView = findViewById(R.id.navigationview);
 456
 457         // Get a handle for the navigation menu.
 458         Menu navigationMenu = navigationView.getMenu();
 459
 460         // Get handles for the navigation menu items.
 461         navigationBackMenuItem = navigationMenu.findItem(R.id.back);
 462         navigationForwardMenuItem = navigationMenu.findItem(R.id.forward);
 463         navigationHistoryMenuItem = navigationMenu.findItem(R.id.history);
 464         navigationRequestsMenuItem = navigationMenu.findItem(R.id.requests);
 465
 466         // Listen for touches on the navigation menu.
 467         navigationView.setNavigationItemSelectedListener(this);
 468
 469         // Get a handle for the app compat delegate.
 470         AppCompatDelegate appCompatDelegate = getDelegate();
 471
 472         // Set the support action bar.
 473         appCompatDelegate.setSupportActionBar(toolbar);
 474
 475         // Get a handle for the action bar.
 476         actionBar = appCompatDelegate.getSupportActionBar();
 477
 478         // Remove the incorrect lint warning below that the action bar might be null.
 479         assert actionBar != null;
 480
 481         // Add the custom layout, which shows the URL text bar.
 482         actionBar.setCustomView(R.layout.url_app_bar);
 483         actionBar.setDisplayOptions(ActionBar.DISPLAY_SHOW_CUSTOM);
 484
 485         // Get handles for the views in the URL app bar.
 486         urlRelativeLayout = findViewById(R.id.url_relativelayout);
 487         urlEditText = findViewById(R.id.url_edittext);
 488
 489         // Create the hamburger icon at the start of the AppBar.
 490         actionBarDrawerToggle = new ActionBarDrawerToggle(this, drawerLayout, toolbar, R.string.open_navigation_drawer, R.string.close_navigation_drawer);
 491
 492         // Initially disable the sliding drawers.  They will be enabled once the blocklists are loaded.
 493         drawerLayout.setDrawerLockMode(DrawerLayout.LOCK_MODE_LOCKED_CLOSED);
 494
 495         // Initialize the web view pager adapter.
 496         webViewPagerAdapter = new WebViewPagerAdapter(getSupportFragmentManager());
 497
 498         // Set the pager adapter on the web view pager.
 499         webViewPager.setAdapter(webViewPagerAdapter);
 500
 501         // Store up to 100 tabs in memory.
 502         webViewPager.setOffscreenPageLimit(100);
 503
 504         // Initialize the app.
 505         initializeApp();
 506
 507         // Apply the app settings from the shared preferences.
 508         applyAppSettings();
 509
 510         // Populate the blocklists.
 511         populateBlocklists = new PopulateBlocklists(this, this).execute();
 512     }
 513
 514     @Override
 515     protected void onNewIntent(Intent intent) {
 516         // Run the default commands.
 517         super.onNewIntent(intent);
 518
 519         // Replace the intent that started the app with this one.
 520         setIntent(intent);
 521
 522         // Check to see if the app is being restarted from a saved state.
 523         if (savedStateArrayList == null || savedStateArrayList.size() == 0) {  // The activity is not being restarted from a saved state.
 524             // Get the information from the intent.
 525             String intentAction = intent.getAction();
 526             Uri intentUriData = intent.getData();
 527             String intentStringExtra = intent.getStringExtra(Intent.EXTRA_TEXT);
 528
 529             // Determine if this is a web search.
 530             boolean isWebSearch = ((intentAction != null) && intentAction.equals(Intent.ACTION_WEB_SEARCH));
 531
 532             // Only process the URI if it contains data or it is a web search.  If the user pressed the desktop icon after the app was already running the URI will be null.
 533             if (intentUriData != null || intentStringExtra != null || isWebSearch) {
 534                 // Exit the full screen video if it is displayed.
 535                 if (displayingFullScreenVideo) {
 536                     // Exit full screen video mode.
 537                     exitFullScreenVideo();
 538
 539                     // Reload the current WebView.  Otherwise, it can display entirely black.
 540                     currentWebView.reload();
 541                 }
 542
 543                 // Get the shared preferences.
 544                 SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 545
 546                 // Create a URL string.
 547                 String url;
 548
 549                 // If the intent action is a web search, perform the search.
 550                 if (isWebSearch) {  // The intent is a web search.
 551                     // Create an encoded URL string.
 552                     String encodedUrlString;
 553
 554                     // Sanitize the search input and convert it to a search.
 555                     try {
 556                         encodedUrlString = URLEncoder.encode(intent.getStringExtra(SearchManager.QUERY), "UTF-8");
 557                     } catch (UnsupportedEncodingException exception) {
 558                         encodedUrlString = "";
 559                     }
 560
 561                     // Add the base search URL.
 562                     url = searchURL + encodedUrlString;
 563                 } else if (intentUriData != null) {  // The intent contains a URL formatted as a URI.
 564                     // Set the intent data as the URL.
 565                     url = intentUriData.toString();
 566                 } else {  // The intent contains a string, which might be a URL.
 567                     // Set the intent string as the URL.
 568                     url = intentStringExtra;
 569                 }
 570
 571                 // Add a new tab if specified in the preferences.
 572                 if (sharedPreferences.getBoolean("open_intents_in_new_tab", true)) {  // Load the URL in a new tab.
 573                     // Set the loading new intent flag.
 574                     loadingNewIntent = true;
 575
 576                     // Add a new tab.
 577                     addNewTab(url, true);
 578                 } else {  // Load the URL in the current tab.
 579                     // Make it so.
 580                     loadUrl(currentWebView, url);
 581                 }
 582
 583                 // Close the navigation drawer if it is open.
 584                 if (drawerLayout.isDrawerVisible(GravityCompat.START)) {
 585                     drawerLayout.closeDrawer(GravityCompat.START);
 586                 }
 587
 588                 // Close the bookmarks drawer if it is open.
 589                 if (drawerLayout.isDrawerVisible(GravityCompat.END)) {
 590                     drawerLayout.closeDrawer(GravityCompat.END);
 591                 }
 592             }
 593         }
 594     }
 595
 596     @Override
 597     public void onRestart() {
 598         // Run the default commands.
 599         super.onRestart();
 600
 601         // Apply the app settings if returning from the Settings activity.
 602         if (reapplyAppSettingsOnRestart) {
 603             // Reset the reapply app settings on restart tracker.
 604             reapplyAppSettingsOnRestart = false;
 605
 606             // Apply the app settings.
 607             applyAppSettings();
 608         }
 609
 610         // Apply the domain settings if returning from the settings or domains activity.
 611         if (reapplyDomainSettingsOnRestart) {
 612             // Reset the reapply domain settings on restart tracker.
 613             reapplyDomainSettingsOnRestart = false;
 614
 615             // Reapply the domain settings for each tab.
 616             for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
 617                 // Get the WebView tab fragment.
 618                 WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 619
 620                 // Get the fragment view.
 621                 View fragmentView = webViewTabFragment.getView();
 622
 623                 // Only reload the WebViews if they exist.
 624                 if (fragmentView != null) {
 625                     // Get the nested scroll WebView from the tab fragment.
 626                     NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 627
 628                     // Reset the current domain name so the domain settings will be reapplied.
 629                     nestedScrollWebView.resetCurrentDomainName();
 630
 631                     // Reapply the domain settings if the URL is not null, which can happen if an empty tab is active when returning from settings.
 632                     if (nestedScrollWebView.getUrl() != null) {
 633                         applyDomainSettings(nestedScrollWebView, nestedScrollWebView.getUrl(), false, true, false);
 634                     }
 635                 }
 636             }
 637         }
 638
 639         // Update the bookmarks drawer if returning from the Bookmarks activity.
 640         if (restartFromBookmarksActivity) {
 641             // Close the bookmarks drawer.
 642             drawerLayout.closeDrawer(GravityCompat.END);
 643
 644             // Reload the bookmarks drawer.
 645             loadBookmarksFolder();
 646
 647             // Reset `restartFromBookmarksActivity`.
 648             restartFromBookmarksActivity = false;
 649         }
 650
 651         // Update the privacy icon.  `true` runs `invalidateOptionsMenu` as the last step.  This can be important if the screen was rotated.
 652         updatePrivacyIcons(true);
 653     }
 654
 655     // `onStart()` runs after `onCreate()` or `onRestart()`.  This is used instead of `onResume()` so the commands aren't called every time the screen is partially hidden.
 656     @Override
 657     public void onStart() {
 658         // Run the default commands.
 659         super.onStart();
 660
 661         // Resume any WebViews.
 662         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
 663             // Get the WebView tab fragment.
 664             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 665
 666             // Get the fragment view.
 667             View fragmentView = webViewTabFragment.getView();
 668
 669             // Only resume the WebViews if they exist (they won't when the app is first created).
 670             if (fragmentView != null) {
 671                 // Get the nested scroll WebView from the tab fragment.
 672                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 673
 674                 // Resume the nested scroll WebView.
 675                 nestedScrollWebView.onResume();
 676             }
 677         }
 678
 679         // Resume the nested scroll WebView JavaScript timers.  This is a global command that resumes JavaScript timers on all WebViews.
 680         if (currentWebView != null) {
 681             currentWebView.resumeTimers();
 682         }
 683
 684         // Reapply the proxy settings if the system is using a proxy.  This redisplays the appropriate alert dialog.
 685         if (!proxyMode.equals(ProxyHelper.NONE)) {
 686             applyProxy(false);
 687         }
 688
 689         // Reapply any system UI flags and the ad in the free flavor.
 690         if (displayingFullScreenVideo || inFullScreenBrowsingMode) {  // The system is displaying a website or a video in full screen mode.
 691             /* Hide the system bars.
 692              * SYSTEM_UI_FLAG_FULLSCREEN hides the status bar at the top of the screen.
 693              * SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN makes the root frame layout fill the area that is normally reserved for the status bar.
 694              * SYSTEM_UI_FLAG_HIDE_NAVIGATION hides the navigation bar on the bottom or right of the screen.
 695              * SYSTEM_UI_FLAG_IMMERSIVE_STICKY makes the status and navigation bars translucent and automatically re-hides them after they are shown.
 696              */
 697             rootFrameLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION |
 698                     View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);
 699         } else if (BuildConfig.FLAVOR.contentEquals("free")) {  // The system in not in full screen mode.
 700             // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
 701             View adView = findViewById(R.id.adview);
 702
 703             // Resume the ad.
 704             AdHelper.resumeAd(adView);
 705         }
 706     }
 707
 708     // `onStop()` runs after `onPause()`.  It is used instead of `onPause()` so the commands are not called every time the screen is partially hidden.
 709     @Override
 710     public void onStop() {
 711         // Run the default commands.
 712         super.onStop();
 713
 714         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
 715             // Get the WebView tab fragment.
 716             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 717
 718             // Get the fragment view.
 719             View fragmentView = webViewTabFragment.getView();
 720
 721             // Only pause the WebViews if they exist (they won't when the app is first created).
 722             if (fragmentView != null) {
 723                 // Get the nested scroll WebView from the tab fragment.
 724                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 725
 726                 // Pause the nested scroll WebView.
 727                 nestedScrollWebView.onPause();
 728             }
 729         }
 730
 731         // Pause the WebView JavaScript timers.  This is a global command that pauses JavaScript on all WebViews.
 732         if (currentWebView != null) {
 733             currentWebView.pauseTimers();
 734         }
 735
 736         // Pause the ad or it will continue to consume resources in the background on the free flavor.
 737         if (BuildConfig.FLAVOR.contentEquals("free")) {
 738             // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
 739             View adView = findViewById(R.id.adview);
 740
 741             // Pause the ad.
 742             AdHelper.pauseAd(adView);
 743         }
 744     }
 745
 746     @Override
 747     public void onSaveInstanceState(@NonNull Bundle savedInstanceState) {
 748         // Run the default commands.
 749         super.onSaveInstanceState(savedInstanceState);
 750
 751         // Create the saved state array lists.
 752         ArrayList<Bundle> savedStateArrayList = new ArrayList<>();
 753         ArrayList<Bundle> savedNestedScrollWebViewStateArrayList = new ArrayList<>();
 754
 755         // Get the URLs from each tab.
 756         for (int i = 0; i < webViewPagerAdapter.getCount(); i++) {
 757             // Get the WebView tab fragment.
 758             WebViewTabFragment webViewTabFragment = webViewPagerAdapter.getPageFragment(i);
 759
 760             // Get the fragment view.
 761             View fragmentView = webViewTabFragment.getView();
 762
 763             if (fragmentView != null) {
 764                 // Get the nested scroll WebView from the tab fragment.
 765                 NestedScrollWebView nestedScrollWebView = fragmentView.findViewById(R.id.nestedscroll_webview);
 766
 767                 // Create saved state bundle.
 768                 Bundle savedStateBundle = new Bundle();
 769
 770                 // Get the current states.
 771                 nestedScrollWebView.saveState(savedStateBundle);
 772                 Bundle savedNestedScrollWebViewStateBundle = nestedScrollWebView.saveNestedScrollWebViewState();
 773
 774                 // Store the saved states in the array lists.
 775                 savedStateArrayList.add(savedStateBundle);
 776                 savedNestedScrollWebViewStateArrayList.add(savedNestedScrollWebViewStateBundle);
 777             }
 778         }
 779
 780         // Get the current tab position.
 781         int currentTabPosition = tabLayout.getSelectedTabPosition();
 782
 783         // Store the saved states in the bundle.
 784         savedInstanceState.putParcelableArrayList(SAVED_STATE_ARRAY_LIST, savedStateArrayList);
 785         savedInstanceState.putParcelableArrayList(SAVED_NESTED_SCROLL_WEBVIEW_STATE_ARRAY_LIST, savedNestedScrollWebViewStateArrayList);
 786         savedInstanceState.putInt(SAVED_TAB_POSITION, currentTabPosition);
 787         savedInstanceState.putString(PROXY_MODE, proxyMode);
 788     }
 789
 790     @Override
 791     public void onDestroy() {
 792         // Unregister the orbot status broadcast receiver if it exists.
 793         if (orbotStatusBroadcastReceiver != null) {
 794             this.unregisterReceiver(orbotStatusBroadcastReceiver);
 795         }
 796
 797         // Close the bookmarks cursor if it exists.
 798         if (bookmarksCursor != null) {
 799             bookmarksCursor.close();
 800         }
 801
 802         // Close the bookmarks database if it exists.
 803         if (bookmarksDatabaseHelper != null) {
 804             bookmarksDatabaseHelper.close();
 805         }
 806
 807         // Stop populating the blocklists if the AsyncTask is running in the background.
 808         if (populateBlocklists != null) {
 809             populateBlocklists.cancel(true);
 810         }
 811
 812         // Run the default commands.
 813         super.onDestroy();
 814     }
 815
 816     @Override
 817     public boolean onCreateOptionsMenu(Menu menu) {
 818         // Inflate the menu.  This adds items to the action bar if it is present.
 819         getMenuInflater().inflate(R.menu.webview_options_menu, menu);
 820
 821         // Store a handle for the options menu so it can be used by `onOptionsItemSelected()` and `updatePrivacyIcons()`.
 822         optionsMenu = menu;
 823
 824         // Get handles for the class menu items.
 825         optionsPrivacyMenuItem = menu.findItem(R.id.javascript);
 826         optionsRefreshMenuItem = menu.findItem(R.id.refresh);
 827         optionsCookiesMenuItem = menu.findItem(R.id.cookies);
 828         optionsDomStorageMenuItem = menu.findItem(R.id.dom_storage);
 829         optionsSaveFormDataMenuItem = menu.findItem(R.id.save_form_data);  // Form data can be removed once the minimum API >= 26.
 830         optionsClearDataMenuItem = menu.findItem(R.id.clear_data);
 831         optionsClearCookiesMenuItem = menu.findItem(R.id.clear_cookies);
 832         optionsClearDomStorageMenuItem = menu.findItem(R.id.clear_dom_storage);
 833         optionsClearFormDataMenuItem = menu.findItem(R.id.clear_form_data);  // Form data can be removed once the minimum API >= 26.
 834         optionsBlocklistsMenuItem = menu.findItem(R.id.blocklists);
 835         optionsEasyListMenuItem = menu.findItem(R.id.easylist);
 836         optionsEasyPrivacyMenuItem = menu.findItem(R.id.easyprivacy);
 837         optionsFanboysAnnoyanceListMenuItem = menu.findItem(R.id.fanboys_annoyance_list);
 838         optionsFanboysSocialBlockingListMenuItem = menu.findItem(R.id.fanboys_social_blocking_list);
 839         optionsUltraListMenuItem = menu.findItem(R.id.ultralist);
 840         optionsUltraPrivacyMenuItem = menu.findItem(R.id.ultraprivacy);
 841         optionsBlockAllThirdPartyRequestsMenuItem = menu.findItem(R.id.block_all_third_party_requests);
 842         optionsProxyMenuItem = menu.findItem(R.id.proxy);
 843         optionsProxyNoneMenuItem = menu.findItem(R.id.proxy_none);
 844         optionsProxyTorMenuItem = menu.findItem(R.id.proxy_tor);
 845         optionsProxyI2pMenuItem = menu.findItem(R.id.proxy_i2p);
 846         optionsProxyCustomMenuItem = menu.findItem(R.id.proxy_custom);
 847         optionsUserAgentMenuItem = menu.findItem(R.id.user_agent);
 848         optionsUserAgentPrivacyBrowserMenuItem = menu.findItem(R.id.user_agent_privacy_browser);
 849         optionsUserAgentWebViewDefaultMenuItem = menu.findItem(R.id.user_agent_webview_default);
 850         optionsUserAgentFirefoxOnAndroidMenuItem = menu.findItem(R.id.user_agent_firefox_on_android);
 851         optionsUserAgentChromeOnAndroidMenuItem = menu.findItem(R.id.user_agent_chrome_on_android);
 852         optionsUserAgentSafariOnIosMenuItem = menu.findItem(R.id.user_agent_safari_on_ios);
 853         optionsUserAgentFirefoxOnLinuxMenuItem = menu.findItem(R.id.user_agent_firefox_on_linux);
 854         optionsUserAgentChromiumOnLinuxMenuItem = menu.findItem(R.id.user_agent_chromium_on_linux);
 855         optionsUserAgentFirefoxOnWindowsMenuItem = menu.findItem(R.id.user_agent_firefox_on_windows);
 856         optionsUserAgentChromeOnWindowsMenuItem = menu.findItem(R.id.user_agent_chrome_on_windows);
 857         optionsUserAgentEdgeOnWindowsMenuItem = menu.findItem(R.id.user_agent_edge_on_windows);
 858         optionsUserAgentInternetExplorerOnWindowsMenuItem = menu.findItem(R.id.user_agent_internet_explorer_on_windows);
 859         optionsUserAgentSafariOnMacosMenuItem = menu.findItem(R.id.user_agent_safari_on_macos);
 860         optionsUserAgentCustomMenuItem = menu.findItem(R.id.user_agent_custom);
 861         optionsSwipeToRefreshMenuItem = menu.findItem(R.id.swipe_to_refresh);
 862         optionsWideViewportMenuItem = menu.findItem(R.id.wide_viewport);
 863         optionsDisplayImagesMenuItem = menu.findItem(R.id.display_images);
 864         optionsDarkWebViewMenuItem = menu.findItem(R.id.dark_webview);
 865         optionsFontSizeMenuItem = menu.findItem(R.id.font_size);
 866         optionsAddOrEditDomainMenuItem = menu.findItem(R.id.add_or_edit_domain);
 867
 868         // Get handles for the method menu items.
 869         MenuItem bookmarksMenuItem = menu.findItem(R.id.bookmarks);
 870         MenuItem adConsentMenuItem = menu.findItem(R.id.ad_consent);
 871
 872         // Set the initial status of the privacy icons.  `false` does not call `invalidateOptionsMenu` as the last step.
 873         updatePrivacyIcons(false);
 874
 875         // Only display the form data menu items if the API < 26.
 876         optionsSaveFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
 877         optionsClearFormDataMenuItem.setVisible(Build.VERSION.SDK_INT < 26);
 878
 879         // Disable the clear form data menu item if the API >= 26 so that the status of the main Clear Data is calculated correctly.
 880         optionsClearFormDataMenuItem.setEnabled(Build.VERSION.SDK_INT < 26);
 881
 882         // Only display the dark WebView menu item if API >= 21.
 883         optionsDarkWebViewMenuItem.setVisible(Build.VERSION.SDK_INT >= 21);
 884
 885         // Only show Ad Consent if this is the free flavor.
 886         adConsentMenuItem.setVisible(BuildConfig.FLAVOR.contentEquals("free"));
 887
 888         // Get the shared preferences.
 889         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
 890
 891         // Get the dark theme and app bar preferences.
 892         boolean displayAdditionalAppBarIcons = sharedPreferences.getBoolean(getString(R.string.display_additional_app_bar_icons_key), false);
 893
 894         // Set the status of the additional app bar icons.  Setting the refresh menu item to `SHOW_AS_ACTION_ALWAYS` makes it appear even on small devices like phones.
 895         if (displayAdditionalAppBarIcons) {
 896             optionsRefreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
 897             bookmarksMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
 898             optionsCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
 899         } else { //Do not display the additional icons.
 900             optionsRefreshMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
 901             bookmarksMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
 902             optionsCookiesMenuItem.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
 903         }
 904
 905         // Replace Refresh with Stop if a URL is already loading.
 906         if (currentWebView != null && currentWebView.getProgress() != 100) {
 907             // Set the title.
 908             optionsRefreshMenuItem.setTitle(R.string.stop);
 909
 910             // Set the icon if it is displayed in the app bar.
 911             if (displayAdditionalAppBarIcons) {
 912                 // Get the current theme status.
 913                 int currentThemeStatus = getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK;
 914
 915                 // Set the icon according to the current theme status.
 916                 if (currentThemeStatus == Configuration.UI_MODE_NIGHT_NO) {
 917                     optionsRefreshMenuItem.setIcon(R.drawable.close_blue_day);
 918                 } else {
 919                     optionsRefreshMenuItem.setIcon(R.drawable.close_blue_night);
 920                 }
 921             }
 922         }
 923
 924         // Done.
 925         return true;
 926     }
 927
 928     @Override
 929     public boolean onPrepareOptionsMenu(Menu menu) {
 930         // Get a handle for the cookie manager.
 931         CookieManager cookieManager = CookieManager.getInstance();
 932
 933         // Initialize the current user agent string and the font size.
 934         String currentUserAgent = getString(R.string.user_agent_privacy_browser);
 935         int fontSize = 100;
 936
 937         // Set items that require the current web view to be populated.  It will be null when the program is first opened, as `onPrepareOptionsMenu()` is called before the first WebView is initialized.
 938         if (currentWebView != null) {
 939             // Set the add or edit domain text.
 940             if (currentWebView.getDomainSettingsApplied()) {
 941                 optionsAddOrEditDomainMenuItem.setTitle(R.string.edit_domain_settings);
 942             } else {
 943                 optionsAddOrEditDomainMenuItem.setTitle(R.string.add_domain_settings);
 944             }
 945
 946             // Get the current user agent from the WebView.
 947             currentUserAgent = currentWebView.getSettings().getUserAgentString();
 948
 949             // Get the current font size from the
 950             fontSize = currentWebView.getSettings().getTextZoom();
 951
 952             // Set the status of the menu item checkboxes.
 953             optionsDomStorageMenuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
 954             optionsSaveFormDataMenuItem.setChecked(currentWebView.getSettings().getSaveFormData());  // Form data can be removed once the minimum API >= 26.
 955             optionsEasyListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
 956             optionsEasyPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
 957             optionsFanboysAnnoyanceListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
 958             optionsFanboysSocialBlockingListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
 959             optionsUltraListMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
 960             optionsUltraPrivacyMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
 961             optionsBlockAllThirdPartyRequestsMenuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
 962             optionsSwipeToRefreshMenuItem.setChecked(currentWebView.getSwipeToRefresh());
 963             optionsWideViewportMenuItem.setChecked(currentWebView.getSettings().getUseWideViewPort());
 964             optionsDisplayImagesMenuItem.setChecked(currentWebView.getSettings().getLoadsImagesAutomatically());
 965
 966             // Initialize the display names for the blocklists with the number of blocked requests.
 967             optionsBlocklistsMenuItem.setTitle(getString(R.string.blocklists) + " - " + currentWebView.getRequestsCount(NestedScrollWebView.BLOCKED_REQUESTS));
 968             optionsEasyListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYLIST) + " - " + getString(R.string.easylist));
 969             optionsEasyPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.EASYPRIVACY) + " - " + getString(R.string.easyprivacy));
 970             optionsFanboysAnnoyanceListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST) + " - " + getString(R.string.fanboys_annoyance_list));
 971             optionsFanboysSocialBlockingListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST) + " - " + getString(R.string.fanboys_social_blocking_list));
 972             optionsUltraListMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRALIST) + " - " + getString(R.string.ultralist));
 973             optionsUltraPrivacyMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.ULTRAPRIVACY) + " - " + getString(R.string.ultraprivacy));
 974             optionsBlockAllThirdPartyRequestsMenuItem.setTitle(currentWebView.getRequestsCount(NestedScrollWebView.THIRD_PARTY_REQUESTS) + " - " + getString(R.string.block_all_third_party_requests));
 975
 976             // Enable DOM Storage if JavaScript is enabled.
 977             optionsDomStorageMenuItem.setEnabled(currentWebView.getSettings().getJavaScriptEnabled());
 978
 979             // Set the checkbox status for dark WebView if the WebView supports it.
 980             if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
 981                 optionsDarkWebViewMenuItem.setChecked(WebSettingsCompat.getForceDark(currentWebView.getSettings()) == WebSettingsCompat.FORCE_DARK_ON);
 982             }
 983         }
 984
 985         // Set the cookies menu item checked status.
 986         optionsCookiesMenuItem.setChecked(cookieManager.acceptCookie());
 987
 988         // Enable Clear Cookies if there are any.
 989         optionsClearCookiesMenuItem.setEnabled(cookieManager.hasCookies());
 990
 991         // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`, which links to `/data/data/com.stoutner.privacybrowser.standard`.
 992         String privateDataDirectoryString = getApplicationInfo().dataDir;
 993
 994         // Get a count of the number of files in the Local Storage directory.
 995         File localStorageDirectory = new File (privateDataDirectoryString + "/app_webview/Local Storage/");
 996         int localStorageDirectoryNumberOfFiles = 0;
 997         if (localStorageDirectory.exists()) {
 998             // `Objects.requireNonNull` removes a lint warning that `localStorageDirectory.list` might produce a null pointed exception if it is dereferenced.
 999             localStorageDirectoryNumberOfFiles = Objects.requireNonNull(localStorageDirectory.list()).length;
1000         }
1001
1002         // Get a count of the number of files in the IndexedDB directory.
1003         File indexedDBDirectory = new File (privateDataDirectoryString + "/app_webview/IndexedDB");
1004         int indexedDBDirectoryNumberOfFiles = 0;
1005         if (indexedDBDirectory.exists()) {
1006             // `Objects.requireNonNull` removes a lint warning that `indexedDBDirectory.list` might produce a null pointed exception if it is dereferenced.
1007             indexedDBDirectoryNumberOfFiles = Objects.requireNonNull(indexedDBDirectory.list()).length;
1008         }
1009
1010         // Enable Clear DOM Storage if there is any.
1011         optionsClearDomStorageMenuItem.setEnabled(localStorageDirectoryNumberOfFiles > 0 || indexedDBDirectoryNumberOfFiles > 0);
1012
1013         // Enable Clear Form Data is there is any.  This can be removed once the minimum API >= 26.
1014         if (Build.VERSION.SDK_INT < 26) {
1015             // Get the WebView database.
1016             WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(this);
1017
1018             // Enable the clear form data menu item if there is anything to clear.
1019             optionsClearFormDataMenuItem.setEnabled(webViewDatabase.hasFormData());
1020         }
1021
1022         // Enable Clear Data if any of the submenu items are enabled.
1023         optionsClearDataMenuItem.setEnabled(optionsClearCookiesMenuItem.isEnabled() || optionsClearDomStorageMenuItem.isEnabled() || optionsClearFormDataMenuItem.isEnabled());
1024
1025         // Disable Fanboy's Social Blocking List menu item if Fanboy's Annoyance List is checked.
1026         optionsFanboysSocialBlockingListMenuItem.setEnabled(!optionsFanboysAnnoyanceListMenuItem.isChecked());
1027
1028         // Set the proxy title and check the applied proxy.
1029         switch (proxyMode) {
1030             case ProxyHelper.NONE:
1031                 // Set the proxy title.
1032                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_none));
1033
1034                 // Check the proxy None radio button.
1035                 optionsProxyNoneMenuItem.setChecked(true);
1036                 break;
1037
1038             case ProxyHelper.TOR:
1039                 // Set the proxy title.
1040                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_tor));
1041
1042                 // Check the proxy Tor radio button.
1043                 optionsProxyTorMenuItem.setChecked(true);
1044                 break;
1045
1046             case ProxyHelper.I2P:
1047                 // Set the proxy title.
1048                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_i2p));
1049
1050                 // Check the proxy I2P radio button.
1051                 optionsProxyI2pMenuItem.setChecked(true);
1052                 break;
1053
1054             case ProxyHelper.CUSTOM:
1055                 // Set the proxy title.
1056                 optionsProxyMenuItem.setTitle(getString(R.string.proxy) + " - " + getString(R.string.proxy_custom));
1057
1058                 // Check the proxy Custom radio button.
1059                 optionsProxyCustomMenuItem.setChecked(true);
1060                 break;
1061         }
1062
1063         // Select the current user agent menu item.  A switch statement cannot be used because the user agents are not compile time constants.
1064         if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[0])) {  // Privacy Browser.
1065             // Update the user agent menu item title.
1066             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_privacy_browser));
1067
1068             // Select the Privacy Browser radio box.
1069             optionsUserAgentPrivacyBrowserMenuItem.setChecked(true);
1070         } else if (currentUserAgent.equals(webViewDefaultUserAgent)) {  // WebView Default.
1071             // Update the user agent menu item title.
1072             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_webview_default));
1073
1074             // Select the WebView Default radio box.
1075             optionsUserAgentWebViewDefaultMenuItem.setChecked(true);
1076         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[2])) {  // Firefox on Android.
1077             // Update the user agent menu item title.
1078             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_android));
1079
1080             // Select the Firefox on Android radio box.
1081             optionsUserAgentFirefoxOnAndroidMenuItem.setChecked(true);
1082         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[3])) {  // Chrome on Android.
1083             // Update the user agent menu item title.
1084             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chrome_on_android));
1085
1086             // Select the Chrome on Android radio box.
1087             optionsUserAgentChromeOnAndroidMenuItem.setChecked(true);
1088         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[4])) {  // Safari on iOS.
1089             // Update the user agent menu item title.
1090             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_safari_on_ios));
1091
1092             // Select the Safari on iOS radio box.
1093             optionsUserAgentSafariOnIosMenuItem.setChecked(true);
1094         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[5])) {  // Firefox on Linux.
1095             // Update the user agent menu item title.
1096             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_linux));
1097
1098             // Select the Firefox on Linux radio box.
1099             optionsUserAgentFirefoxOnLinuxMenuItem.setChecked(true);
1100         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[6])) {  // Chromium on Linux.
1101             // Update the user agent menu item title.
1102             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chromium_on_linux));
1103
1104             // Select the Chromium on Linux radio box.
1105             optionsUserAgentChromiumOnLinuxMenuItem.setChecked(true);
1106         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[7])) {  // Firefox on Windows.
1107             // Update the user agent menu item title.
1108             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_firefox_on_windows));
1109
1110             // Select the Firefox on Windows radio box.
1111             optionsUserAgentFirefoxOnWindowsMenuItem.setChecked(true);
1112         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[8])) {  // Chrome on Windows.
1113             // Update the user agent menu item title.
1114             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_chrome_on_windows));
1115
1116             // Select the Chrome on Windows radio box.
1117             optionsUserAgentChromeOnWindowsMenuItem.setChecked(true);
1118         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[9])) {  // Edge on Windows.
1119             // Update the user agent menu item title.
1120             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_edge_on_windows));
1121
1122             // Select the Edge on Windows radio box.
1123             optionsUserAgentEdgeOnWindowsMenuItem.setChecked(true);
1124         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[10])) {  // Internet Explorer on Windows.
1125             // Update the user agent menu item title.
1126             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_internet_explorer_on_windows));
1127
1128             // Select the Internet on Windows radio box.
1129             optionsUserAgentInternetExplorerOnWindowsMenuItem.setChecked(true);
1130         } else if (currentUserAgent.equals(getResources().getStringArray(R.array.user_agent_data)[11])) {  // Safari on macOS.
1131             // Update the user agent menu item title.
1132             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_safari_on_macos));
1133
1134             // Select the Safari on macOS radio box.
1135             optionsUserAgentSafariOnMacosMenuItem.setChecked(true);
1136         } else {  // Custom user agent.
1137             // Update the user agent menu item title.
1138             optionsUserAgentMenuItem.setTitle(getString(R.string.options_user_agent) + " - " + getString(R.string.user_agent_custom));
1139
1140             // Select the Custom radio box.
1141             optionsUserAgentCustomMenuItem.setChecked(true);
1142         }
1143
1144         // Set the font size title.
1145         optionsFontSizeMenuItem.setTitle(getString(R.string.font_size) + " - " + fontSize + "%");
1146
1147         // Run all the other default commands.
1148         super.onPrepareOptionsMenu(menu);
1149
1150         // Display the menu.
1151         return true;
1152     }
1153
1154     @Override
1155     public boolean onOptionsItemSelected(MenuItem menuItem) {
1156         // Get a handle for the shared preferences.
1157         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1158
1159         // Get a handle for the cookie manager.
1160         CookieManager cookieManager = CookieManager.getInstance();
1161
1162         // Get the selected menu item ID.
1163         int menuItemId = menuItem.getItemId();
1164
1165         // Run the commands that correlate to the selected menu item.
1166         if (menuItemId == R.id.javascript) {  // JavaScript.
1167             // Toggle the JavaScript status.
1168             currentWebView.getSettings().setJavaScriptEnabled(!currentWebView.getSettings().getJavaScriptEnabled());
1169
1170             // Update the privacy icon.
1171             updatePrivacyIcons(true);
1172
1173             // Display a `Snackbar`.
1174             if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScrip is enabled.
1175                 Snackbar.make(webViewPager, R.string.javascript_enabled, Snackbar.LENGTH_SHORT).show();
1176             } else if (cookieManager.acceptCookie()) {  // JavaScript is disabled, but first-party cookies are enabled.
1177                 Snackbar.make(webViewPager, R.string.javascript_disabled, Snackbar.LENGTH_SHORT).show();
1178             } else {  // Privacy mode.
1179                 Snackbar.make(webViewPager, R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1180             }
1181
1182             // Reload the current WebView.
1183             currentWebView.reload();
1184
1185             // Consume the event.
1186             return true;
1187         } else if (menuItemId == R.id.refresh) {  // Refresh.
1188             // Run the command that correlates to the current status of the menu item.
1189             if (menuItem.getTitle().equals(getString(R.string.refresh))) {  // The refresh button was pushed.
1190                 // Reload the current WebView.
1191                 currentWebView.reload();
1192             } else {  // The stop button was pushed.
1193                 // Stop the loading of the WebView.
1194                 currentWebView.stopLoading();
1195             }
1196
1197             // Consume the event.
1198             return true;
1199         } else if (menuItemId == R.id.bookmarks) {  // Bookmarks.
1200             // Open the bookmarks drawer.
1201             drawerLayout.openDrawer(GravityCompat.END);
1202
1203             // Consume the event.
1204             return true;
1205         } else if (menuItemId == R.id.cookies) {  // Cookies.
1206             // Switch the first-party cookie status.
1207             cookieManager.setAcceptCookie(!cookieManager.acceptCookie());
1208
1209             // Store the cookie status.
1210             currentWebView.setAcceptCookies(cookieManager.acceptCookie());
1211
1212             // Update the menu checkbox.
1213             menuItem.setChecked(cookieManager.acceptCookie());
1214
1215             // Update the privacy icon.
1216             updatePrivacyIcons(true);
1217
1218             // Display a snackbar.
1219             if (cookieManager.acceptCookie()) {  // Cookies are enabled.
1220                 Snackbar.make(webViewPager, R.string.cookies_enabled, Snackbar.LENGTH_SHORT).show();
1221             } else if (currentWebView.getSettings().getJavaScriptEnabled()) {  // JavaScript is still enabled.
1222                 Snackbar.make(webViewPager, R.string.cookies_disabled, Snackbar.LENGTH_SHORT).show();
1223             } else {  // Privacy mode.
1224                 Snackbar.make(webViewPager, R.string.privacy_mode, Snackbar.LENGTH_SHORT).show();
1225             }
1226
1227             // Reload the current WebView.
1228             currentWebView.reload();
1229
1230             // Consume the event.
1231             return true;
1232         } else if (menuItemId == R.id.dom_storage) {  // DOM storage.
1233             // Toggle the status of domStorageEnabled.
1234             currentWebView.getSettings().setDomStorageEnabled(!currentWebView.getSettings().getDomStorageEnabled());
1235
1236             // Update the menu checkbox.
1237             menuItem.setChecked(currentWebView.getSettings().getDomStorageEnabled());
1238
1239             // Update the privacy icon.
1240             updatePrivacyIcons(true);
1241
1242             // Display a snackbar.
1243             if (currentWebView.getSettings().getDomStorageEnabled()) {
1244                 Snackbar.make(webViewPager, R.string.dom_storage_enabled, Snackbar.LENGTH_SHORT).show();
1245             } else {
1246                 Snackbar.make(webViewPager, R.string.dom_storage_disabled, Snackbar.LENGTH_SHORT).show();
1247             }
1248
1249             // Reload the current WebView.
1250             currentWebView.reload();
1251
1252             // Consume the event.
1253             return true;
1254         } else if (menuItemId == R.id.save_form_data) {  // Form data.  This can be removed once the minimum API >= 26.
1255             // Switch the status of saveFormDataEnabled.
1256             currentWebView.getSettings().setSaveFormData(!currentWebView.getSettings().getSaveFormData());
1257
1258             // Update the menu checkbox.
1259             menuItem.setChecked(currentWebView.getSettings().getSaveFormData());
1260
1261             // Display a snackbar.
1262             if (currentWebView.getSettings().getSaveFormData()) {
1263                 Snackbar.make(webViewPager, R.string.form_data_enabled, Snackbar.LENGTH_SHORT).show();
1264             } else {
1265                 Snackbar.make(webViewPager, R.string.form_data_disabled, Snackbar.LENGTH_SHORT).show();
1266             }
1267
1268             // Update the privacy icon.
1269             updatePrivacyIcons(true);
1270
1271             // Reload the current WebView.
1272             currentWebView.reload();
1273
1274             // Consume the event.
1275             return true;
1276         } else if (menuItemId == R.id.clear_cookies) {  // Clear cookies.
1277             // Create a snackbar.
1278             Snackbar.make(webViewPager, R.string.cookies_deleted, Snackbar.LENGTH_LONG)
1279                     .setAction(R.string.undo, v -> {
1280                         // Do nothing because everything will be handled by `onDismissed()` below.
1281                     })
1282                     .addCallback(new Snackbar.Callback() {
1283                         @Override
1284                         public void onDismissed(Snackbar snackbar, int event) {
1285                             if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1286                                 // Delete the cookies, which command varies by SDK.
1287                                 if (Build.VERSION.SDK_INT < 21) {
1288                                     cookieManager.removeAllCookie();
1289                                 } else {
1290                                     cookieManager.removeAllCookies(null);
1291                                 }
1292                             }
1293                         }
1294                     })
1295                     .show();
1296
1297             // Consume the event.
1298             return true;
1299         } else if (menuItemId == R.id.clear_dom_storage) {  // Clear DOM storage.
1300             // Create a snackbar.
1301             Snackbar.make(webViewPager, R.string.dom_storage_deleted, Snackbar.LENGTH_LONG)
1302                     .setAction(R.string.undo, v -> {
1303                         // Do nothing because everything will be handled by `onDismissed()` below.
1304                     })
1305                     .addCallback(new Snackbar.Callback() {
1306                         @Override
1307                         public void onDismissed(Snackbar snackbar, int event) {
1308                             if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1309                                 // Delete the DOM Storage.
1310                                 WebStorage webStorage = WebStorage.getInstance();
1311                                 webStorage.deleteAllData();
1312
1313                                 // Initialize a handler to manually delete the DOM storage files and directories.
1314                                 Handler deleteDomStorageHandler = new Handler();
1315
1316                                 // Setup a runnable to manually delete the DOM storage files and directories.
1317                                 Runnable deleteDomStorageRunnable = () -> {
1318                                     try {
1319                                         // Get a handle for the runtime.
1320                                         Runtime runtime = Runtime.getRuntime();
1321
1322                                         // Get the application's private data directory, which will be something like `/data/user/0/com.stoutner.privacybrowser.standard`,
1323                                         // which links to `/data/data/com.stoutner.privacybrowser.standard`.
1324                                         String privateDataDirectoryString = getApplicationInfo().dataDir;
1325
1326                                         // A string array must be used because the directory contains a space and `Runtime.exec` will otherwise not escape the string correctly.
1327                                         Process deleteLocalStorageProcess = runtime.exec(new String[]{"rm", "-rf", privateDataDirectoryString + "/app_webview/Local Storage/"});
1328
1329                                         // Multiple commands must be used because `Runtime.exec()` does not like `*`.
1330                                         Process deleteIndexProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/IndexedDB");
1331                                         Process deleteQuotaManagerProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager");
1332                                         Process deleteQuotaManagerJournalProcess = runtime.exec("rm -f " + privateDataDirectoryString + "/app_webview/QuotaManager-journal");
1333                                         Process deleteDatabasesProcess = runtime.exec("rm -rf " + privateDataDirectoryString + "/app_webview/databases");
1334
1335                                         // Wait for the processes to finish.
1336                                         deleteLocalStorageProcess.waitFor();
1337                                         deleteIndexProcess.waitFor();
1338                                         deleteQuotaManagerProcess.waitFor();
1339                                         deleteQuotaManagerJournalProcess.waitFor();
1340                                         deleteDatabasesProcess.waitFor();
1341                                     } catch (Exception exception) {
1342                                         // Do nothing if an error is thrown.
1343                                     }
1344                                 };
1345
1346                                 // Manually delete the DOM storage files after 200 milliseconds.
1347                                 deleteDomStorageHandler.postDelayed(deleteDomStorageRunnable, 200);
1348                             }
1349                         }
1350                     })
1351                     .show();
1352
1353             // Consume the event.
1354             return true;
1355         } else if (menuItemId == R.id.clear_form_data) {  // Clear form data.  This can be remove once the minimum API >= 26.
1356             // Create a snackbar.
1357             Snackbar.make(webViewPager, R.string.form_data_deleted, Snackbar.LENGTH_LONG)
1358                     .setAction(R.string.undo, v -> {
1359                         // Do nothing because everything will be handled by `onDismissed()` below.
1360                     })
1361                     .addCallback(new Snackbar.Callback() {
1362                         @Override
1363                         public void onDismissed(Snackbar snackbar, int event) {
1364                             if (event != Snackbar.Callback.DISMISS_EVENT_ACTION) {  // The snackbar was dismissed without the undo button being pushed.
1365                                 // Get a handle for the webView database.
1366                                 WebViewDatabase webViewDatabase = WebViewDatabase.getInstance(getApplicationContext());
1367
1368                                 // Delete the form data.
1369                                 webViewDatabase.clearFormData();
1370                             }
1371                         }
1372                     })
1373                     .show();
1374
1375             // Consume the event.
1376             return true;
1377         } else if (menuItemId == R.id.easylist) {  // EasyList.
1378             // Toggle the EasyList status.
1379             currentWebView.enableBlocklist(NestedScrollWebView.EASYLIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
1380
1381             // Update the menu checkbox.
1382             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYLIST));
1383
1384             // Reload the current WebView.
1385             currentWebView.reload();
1386
1387             // Consume the event.
1388             return true;
1389         } else if (menuItemId == R.id.easyprivacy) {  // EasyPrivacy.
1390             // Toggle the EasyPrivacy status.
1391             currentWebView.enableBlocklist(NestedScrollWebView.EASYPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
1392
1393             // Update the menu checkbox.
1394             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.EASYPRIVACY));
1395
1396             // Reload the current WebView.
1397             currentWebView.reload();
1398
1399             // Consume the event.
1400             return true;
1401         } else if (menuItemId == R.id.fanboys_annoyance_list) {  // Fanboy's Annoyance List.
1402             // Toggle Fanboy's Annoyance List status.
1403             currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1404
1405             // Update the menu checkbox.
1406             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1407
1408             // Update the status of Fanboy's Social Blocking List.
1409             optionsFanboysSocialBlockingListMenuItem.setEnabled(!currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_ANNOYANCE_LIST));
1410
1411             // Reload the current WebView.
1412             currentWebView.reload();
1413
1414             // Consume the event.
1415             return true;
1416         } else if (menuItemId == R.id.fanboys_social_blocking_list) {  // Fanboy's Social Blocking List.
1417             // Toggle Fanboy's Social Blocking List status.
1418             currentWebView.enableBlocklist(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
1419
1420             // Update the menu checkbox.
1421             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.FANBOYS_SOCIAL_BLOCKING_LIST));
1422
1423             // Reload the current WebView.
1424             currentWebView.reload();
1425
1426             // Consume the event.
1427             return true;
1428         } else if (menuItemId == R.id.ultralist) {  // UltraList.
1429             // Toggle the UltraList status.
1430             currentWebView.enableBlocklist(NestedScrollWebView.ULTRALIST, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
1431
1432             // Update the menu checkbox.
1433             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRALIST));
1434
1435             // Reload the current WebView.
1436             currentWebView.reload();
1437
1438             // Consume the event.
1439             return true;
1440         } else if (menuItemId == R.id.ultraprivacy) {  // UltraPrivacy.
1441             // Toggle the UltraPrivacy status.
1442             currentWebView.enableBlocklist(NestedScrollWebView.ULTRAPRIVACY, !currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
1443
1444             // Update the menu checkbox.
1445             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.ULTRAPRIVACY));
1446
1447             // Reload the current WebView.
1448             currentWebView.reload();
1449
1450             // Consume the event.
1451             return true;
1452         } else if (menuItemId == R.id.block_all_third_party_requests) {  // Block all third-party requests.
1453             //Toggle the third-party requests blocker status.
1454             currentWebView.enableBlocklist(NestedScrollWebView.THIRD_PARTY_REQUESTS, !currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1455
1456             // Update the menu checkbox.
1457             menuItem.setChecked(currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
1458
1459             // Reload the current WebView.
1460             currentWebView.reload();
1461
1462             // Consume the event.
1463             return true;
1464         } else if (menuItemId == R.id.proxy_none) {  // Proxy - None.
1465             // Update the proxy mode.
1466             proxyMode = ProxyHelper.NONE;
1467
1468             // Apply the proxy mode.
1469             applyProxy(true);
1470
1471             // Consume the event.
1472             return true;
1473         } else if (menuItemId == R.id.proxy_tor) {  // Proxy - Tor.
1474             // Update the proxy mode.
1475             proxyMode = ProxyHelper.TOR;
1476
1477             // Apply the proxy mode.
1478             applyProxy(true);
1479
1480             // Consume the event.
1481             return true;
1482         } else if (menuItemId == R.id.proxy_i2p) {  // Proxy - I2P.
1483             // Update the proxy mode.
1484             proxyMode = ProxyHelper.I2P;
1485
1486             // Apply the proxy mode.
1487             applyProxy(true);
1488
1489             // Consume the event.
1490             return true;
1491         } else if (menuItemId == R.id.proxy_custom) {  // Proxy - Custom.
1492             // Update the proxy mode.
1493             proxyMode = ProxyHelper.CUSTOM;
1494
1495             // Apply the proxy mode.
1496             applyProxy(true);
1497
1498             // Consume the event.
1499             return true;
1500         } else if (menuItemId == R.id.user_agent_privacy_browser) {  // User Agent - Privacy Browser.
1501             // Update the user agent.
1502             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[0]);
1503
1504             // Reload the current WebView.
1505             currentWebView.reload();
1506
1507             // Consume the event.
1508             return true;
1509         } else if (menuItemId == R.id.user_agent_webview_default) {  // User Agent - WebView Default.
1510             // Update the user agent.
1511             currentWebView.getSettings().setUserAgentString("");
1512
1513             // Reload the current WebView.
1514             currentWebView.reload();
1515
1516             // Consume the event.
1517             return true;
1518         } else if (menuItemId == R.id.user_agent_firefox_on_android) {  // User Agent - Firefox on Android.
1519             // Update the user agent.
1520             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[2]);
1521
1522             // Reload the current WebView.
1523             currentWebView.reload();
1524
1525             // Consume the event.
1526             return true;
1527         } else if (menuItemId == R.id.user_agent_chrome_on_android) {  // User Agent - Chrome on Android.
1528             // Update the user agent.
1529             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[3]);
1530
1531             // Reload the current WebView.
1532             currentWebView.reload();
1533
1534             // Consume the event.
1535             return true;
1536         } else if (menuItemId == R.id.user_agent_safari_on_ios) {  // User Agent - Safari on iOS.
1537             // Update the user agent.
1538             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[4]);
1539
1540             // Reload the current WebView.
1541             currentWebView.reload();
1542
1543             // Consume the event.
1544             return true;
1545         } else if (menuItemId == R.id.user_agent_firefox_on_linux) {  // User Agent - Firefox on Linux.
1546             // Update the user agent.
1547             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[5]);
1548
1549             // Reload the current WebView.
1550             currentWebView.reload();
1551
1552             // Consume the event.
1553             return true;
1554         } else if (menuItemId == R.id.user_agent_chromium_on_linux) {  // User Agent - Chromium on Linux.
1555             // Update the user agent.
1556             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[6]);
1557
1558             // Reload the current WebView.
1559             currentWebView.reload();
1560
1561             // Consume the event.
1562             return true;
1563         } else if (menuItemId == R.id.user_agent_firefox_on_windows) {  // User Agent - Firefox on Windows.
1564             // Update the user agent.
1565             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[7]);
1566
1567             // Reload the current WebView.
1568             currentWebView.reload();
1569
1570             // Consume the event.
1571             return true;
1572         } else if (menuItemId == R.id.user_agent_chrome_on_windows) {  // User Agent - Chrome on Windows.
1573             // Update the user agent.
1574             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[8]);
1575
1576             // Reload the current WebView.
1577             currentWebView.reload();
1578
1579             // Consume the event.
1580             return true;
1581         } else if (menuItemId == R.id.user_agent_edge_on_windows) {  // User Agent - Edge on Windows.
1582             // Update the user agent.
1583             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[9]);
1584
1585             // Reload the current WebView.
1586             currentWebView.reload();
1587
1588             // Consume the event.
1589             return true;
1590         } else if (menuItemId == R.id.user_agent_internet_explorer_on_windows) {  // User Agent - Internet Explorer on Windows.
1591             // Update the user agent.
1592             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[10]);
1593
1594             // Reload the current WebView.
1595             currentWebView.reload();
1596
1597             // Consume the event.
1598             return true;
1599         } else if (menuItemId == R.id.user_agent_safari_on_macos) {  // User Agent - Safari on macOS.
1600             // Update the user agent.
1601             currentWebView.getSettings().setUserAgentString(getResources().getStringArray(R.array.user_agent_data)[11]);
1602
1603             // Reload the current WebView.
1604             currentWebView.reload();
1605
1606             // Consume the event.
1607             return true;
1608         } else if (menuItemId == R.id.user_agent_custom) {  // User Agent - Custom.
1609             // Update the user agent.
1610             currentWebView.getSettings().setUserAgentString(sharedPreferences.getString("custom_user_agent", getString(R.string.custom_user_agent_default_value)));
1611
1612             // Reload the current WebView.
1613             currentWebView.reload();
1614
1615             // Consume the event.
1616             return true;
1617         } else if (menuItemId == R.id.font_size) {  // Font size.
1618             // Instantiate the font size dialog.
1619             DialogFragment fontSizeDialogFragment = FontSizeDialog.displayDialog(currentWebView.getSettings().getTextZoom());
1620
1621             // Show the font size dialog.
1622             fontSizeDialogFragment.show(getSupportFragmentManager(), getString(R.string.font_size));
1623
1624             // Consume the event.
1625             return true;
1626         } else if (menuItemId == R.id.swipe_to_refresh) {  // Swipe to refresh.
1627             // Toggle the stored status of swipe to refresh.
1628             currentWebView.setSwipeToRefresh(!currentWebView.getSwipeToRefresh());
1629
1630             // Update the swipe refresh layout.
1631             if (currentWebView.getSwipeToRefresh()) {  // Swipe to refresh is enabled.
1632                 // Only enable the swipe refresh layout if the WebView is scrolled to the top.  It is updated every time the scroll changes.
1633                 swipeRefreshLayout.setEnabled(currentWebView.getScrollY() == 0);
1634             } else {  // Swipe to refresh is disabled.
1635                 // Disable the swipe refresh layout.
1636                 swipeRefreshLayout.setEnabled(false);
1637             }
1638
1639             // Consume the event.
1640             return true;
1641         } else if (menuItemId == R.id.wide_viewport) {  // Wide viewport.
1642             // Toggle the viewport.
1643             currentWebView.getSettings().setUseWideViewPort(!currentWebView.getSettings().getUseWideViewPort());
1644
1645             // Consume the event.
1646             return true;
1647         } else if (menuItemId == R.id.display_images) {  // Display images.
1648             // Toggle the displaying of images.
1649             if (currentWebView.getSettings().getLoadsImagesAutomatically()) {  // Images are currently loaded automatically.
1650                 // Disable loading of images.
1651                 currentWebView.getSettings().setLoadsImagesAutomatically(false);
1652
1653                 // Reload the website to remove existing images.
1654                 currentWebView.reload();
1655             } else {  // Images are not currently loaded automatically.
1656                 // Enable loading of images.  Missing images will be loaded without the need for a reload.
1657                 currentWebView.getSettings().setLoadsImagesAutomatically(true);
1658             }
1659
1660             // Consume the event.
1661             return true;
1662         } else if (menuItemId == R.id.dark_webview) {  // Dark WebView.
1663             // Check to see if dark WebView is supported by this WebView.
1664             if (WebViewFeature.isFeatureSupported(WebViewFeature.FORCE_DARK)) {
1665                 // Toggle the dark WebView setting.
1666                 if (WebSettingsCompat.getForceDark(currentWebView.getSettings()) == WebSettingsCompat.FORCE_DARK_ON) {  // Dark WebView is currently enabled.
1667                     // Turn off dark WebView.
1668                     WebSettingsCompat.setForceDark(currentWebView.getSettings(), WebSettingsCompat.FORCE_DARK_OFF);
1669                 } else {  // Dark WebView is currently disabled.
1670                     // Turn on dark WebView.
1671                     WebSettingsCompat.setForceDark(currentWebView.getSettings(), WebSettingsCompat.FORCE_DARK_ON);
1672                 }
1673             }
1674
1675             // Consume the event.
1676             return true;
1677         } else if (menuItemId == R.id.find_on_page) {  // Find on page.
1678             // Get a handle for the views.
1679             Toolbar toolbar = findViewById(R.id.toolbar);
1680             LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
1681             EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
1682
1683             // Set the minimum height of the find on page linear layout to match the toolbar.
1684             findOnPageLinearLayout.setMinimumHeight(toolbar.getHeight());
1685
1686             // Hide the toolbar.
1687             toolbar.setVisibility(View.GONE);
1688
1689             // Show the find on page linear layout.
1690             findOnPageLinearLayout.setVisibility(View.VISIBLE);
1691
1692             // Display the keyboard.  The app must wait 200 ms before running the command to work around a bug in Android.
1693             // http://stackoverflow.com/questions/5520085/android-show-softkeyboard-with-showsoftinput-is-not-working
1694             findOnPageEditText.postDelayed(() -> {
1695                 // Set the focus on the find on page edit text.
1696                 findOnPageEditText.requestFocus();
1697
1698                 // Get a handle for the input method manager.
1699                 InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
1700
1701                 // Remove the lint warning below that the input method manager might be null.
1702                 assert inputMethodManager != null;
1703
1704                 // Display the keyboard.  `0` sets no input flags.
1705                 inputMethodManager.showSoftInput(findOnPageEditText, 0);
1706             }, 200);
1707
1708             // Consume the event.
1709             return true;
1710         } else if (menuItemId == R.id.print) {  // Print.
1711             // Get a print manager instance.
1712             PrintManager printManager = (PrintManager) getSystemService(Context.PRINT_SERVICE);
1713
1714             // Remove the lint error below that print manager might be null.
1715             assert printManager != null;
1716
1717             // Create a print document adapter from the current WebView.
1718             PrintDocumentAdapter printDocumentAdapter = currentWebView.createPrintDocumentAdapter();
1719
1720             // Print the document.
1721             printManager.print(getString(R.string.privacy_browser_webpage), printDocumentAdapter, null);
1722
1723             // Consume the event.
1724             return true;
1725         } else if (menuItemId == R.id.save_url) {  // Save URL.
1726             // Check the download preference.
1727             if (downloadWithExternalApp) {  // Download with an external app.
1728                 downloadUrlWithExternalApp(currentWebView.getCurrentUrl());
1729             } else {  // Handle the download inside of Privacy Browser.
1730                 // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
1731                 new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
1732                         currentWebView.getAcceptCookies()).execute(currentWebView.getCurrentUrl());
1733             }
1734
1735             // Consume the event.
1736             return true;
1737         } else if (menuItemId == R.id.save_archive) {
1738             // Instantiate the save dialog.
1739             DialogFragment saveArchiveFragment = SaveWebpageDialog.saveWebpage(SaveWebpageDialog.SAVE_ARCHIVE, currentWebView.getCurrentUrl(), null, null, null,
1740                     false);
1741
1742             // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
1743             saveArchiveFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
1744
1745             return true;
1746         } else if (menuItemId == R.id.save_image) {  // Save image.
1747             // Instantiate the save dialog.
1748             DialogFragment saveImageFragment = SaveWebpageDialog.saveWebpage(SaveWebpageDialog.SAVE_IMAGE, currentWebView.getCurrentUrl(), null, null, null,
1749                     false);
1750
1751             // Show the save dialog.  It must be named `save_dialog` so that the file picker can update the file name.
1752             saveImageFragment.show(getSupportFragmentManager(), getString(R.string.save_dialog));
1753
1754             // Consume the event.
1755             return true;
1756         } else if (menuItemId == R.id.add_to_homescreen) {  // Add to homescreen.
1757             // Instantiate the create home screen shortcut dialog.
1758             DialogFragment createHomeScreenShortcutDialogFragment = CreateHomeScreenShortcutDialog.createDialog(currentWebView.getTitle(), currentWebView.getUrl(),
1759                     currentWebView.getFavoriteOrDefaultIcon());
1760
1761             // Show the create home screen shortcut dialog.
1762             createHomeScreenShortcutDialogFragment.show(getSupportFragmentManager(), getString(R.string.create_shortcut));
1763
1764             // Consume the event.
1765             return true;
1766         } else if (menuItemId == R.id.view_source) {  // View source.
1767             // Create an intent to launch the view source activity.
1768             Intent viewSourceIntent = new Intent(this, ViewSourceActivity.class);
1769
1770             // Add the variables to the intent.
1771             viewSourceIntent.putExtra(ViewSourceActivityKt.CURRENT_URL, currentWebView.getUrl());
1772             viewSourceIntent.putExtra(ViewSourceActivityKt.USER_AGENT, currentWebView.getSettings().getUserAgentString());
1773
1774             // Make it so.
1775             startActivity(viewSourceIntent);
1776
1777             // Consume the event.
1778             return true;
1779         } else if (menuItemId == R.id.share_url) {  // Share URL.
1780             // Setup the share string.
1781             String shareString = currentWebView.getTitle() + " – " + currentWebView.getUrl();
1782
1783             // Create the share intent.
1784             Intent shareIntent = new Intent(Intent.ACTION_SEND);
1785
1786             // Add the share string to the intent.
1787             shareIntent.putExtra(Intent.EXTRA_TEXT, shareString);
1788
1789             // Set the MIME type.
1790             shareIntent.setType("text/plain");
1791
1792             // Set the intent to open in a new task.
1793             shareIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
1794
1795             // Make it so.
1796             startActivity(Intent.createChooser(shareIntent, getString(R.string.share_url)));
1797
1798             // Consume the event.
1799             return true;
1800         } else if (menuItemId == R.id.open_with_app) {  // Open with app.
1801             // Open the URL with an outside app.
1802             openWithApp(currentWebView.getUrl());
1803
1804             // Consume the event.
1805             return true;
1806         } else if (menuItemId == R.id.open_with_browser) {  // Open with browser.
1807             // Open the URL with an outside browser.
1808             openWithBrowser(currentWebView.getUrl());
1809
1810             // Consume the event.
1811             return true;
1812         } else if (menuItemId == R.id.add_or_edit_domain) {  // Add or edit domain.
1813             // Check if domain settings currently exist.
1814             if (currentWebView.getDomainSettingsApplied()) {  // Edit the current domain settings.
1815                 // Reapply the domain settings on returning to `MainWebViewActivity`.
1816                 reapplyDomainSettingsOnRestart = true;
1817
1818                 // Create an intent to launch the domains activity.
1819                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
1820
1821                 // Add the extra information to the intent.
1822                 domainsIntent.putExtra("load_domain", currentWebView.getDomainSettingsDatabaseId());
1823                 domainsIntent.putExtra("close_on_back", true);
1824                 domainsIntent.putExtra("current_url", currentWebView.getUrl());
1825
1826                 // Get the current certificate.
1827                 SslCertificate sslCertificate = currentWebView.getCertificate();
1828
1829                 // Check to see if the SSL certificate is populated.
1830                 if (sslCertificate != null) {
1831                     // Extract the certificate to strings.
1832                     String issuedToCName = sslCertificate.getIssuedTo().getCName();
1833                     String issuedToOName = sslCertificate.getIssuedTo().getOName();
1834                     String issuedToUName = sslCertificate.getIssuedTo().getUName();
1835                     String issuedByCName = sslCertificate.getIssuedBy().getCName();
1836                     String issuedByOName = sslCertificate.getIssuedBy().getOName();
1837                     String issuedByUName = sslCertificate.getIssuedBy().getUName();
1838                     long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
1839                     long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
1840
1841                     // Add the certificate to the intent.
1842                     domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1843                     domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1844                     domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1845                     domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1846                     domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1847                     domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1848                     domainsIntent.putExtra("ssl_start_date", startDateLong);
1849                     domainsIntent.putExtra("ssl_end_date", endDateLong);
1850                 }
1851
1852                 // Check to see if the current IP addresses have been received.
1853                 if (currentWebView.hasCurrentIpAddresses()) {
1854                     // Add the current IP addresses to the intent.
1855                     domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1856                 }
1857
1858                 // Make it so.
1859                 startActivity(domainsIntent);
1860             } else {  // Add a new domain.
1861                 // Apply the new domain settings on returning to `MainWebViewActivity`.
1862                 reapplyDomainSettingsOnRestart = true;
1863
1864                 // Get the current domain
1865                 Uri currentUri = Uri.parse(currentWebView.getUrl());
1866                 String currentDomain = currentUri.getHost();
1867
1868                 // Initialize the database handler.  The `0` specifies the database version, but that is ignored and set instead using a constant in `DomainsDatabaseHelper`.
1869                 DomainsDatabaseHelper domainsDatabaseHelper = new DomainsDatabaseHelper(this, null, null, 0);
1870
1871                 // Create the domain and store the database ID.
1872                 int newDomainDatabaseId = domainsDatabaseHelper.addDomain(currentDomain);
1873
1874                 // Create an intent to launch the domains activity.
1875                 Intent domainsIntent = new Intent(this, DomainsActivity.class);
1876
1877                 // Add the extra information to the intent.
1878                 domainsIntent.putExtra("load_domain", newDomainDatabaseId);
1879                 domainsIntent.putExtra("close_on_back", true);
1880                 domainsIntent.putExtra("current_url", currentWebView.getUrl());
1881
1882                 // Get the current certificate.
1883                 SslCertificate sslCertificate = currentWebView.getCertificate();
1884
1885                 // Check to see if the SSL certificate is populated.
1886                 if (sslCertificate != null) {
1887                     // Extract the certificate to strings.
1888                     String issuedToCName = sslCertificate.getIssuedTo().getCName();
1889                     String issuedToOName = sslCertificate.getIssuedTo().getOName();
1890                     String issuedToUName = sslCertificate.getIssuedTo().getUName();
1891                     String issuedByCName = sslCertificate.getIssuedBy().getCName();
1892                     String issuedByOName = sslCertificate.getIssuedBy().getOName();
1893                     String issuedByUName = sslCertificate.getIssuedBy().getUName();
1894                     long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
1895                     long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
1896
1897                     // Add the certificate to the intent.
1898                     domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
1899                     domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
1900                     domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
1901                     domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
1902                     domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
1903                     domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
1904                     domainsIntent.putExtra("ssl_start_date", startDateLong);
1905                     domainsIntent.putExtra("ssl_end_date", endDateLong);
1906                 }
1907
1908                 // Check to see if the current IP addresses have been received.
1909                 if (currentWebView.hasCurrentIpAddresses()) {
1910                     // Add the current IP addresses to the intent.
1911                     domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
1912                 }
1913
1914                 // Make it so.
1915                 startActivity(domainsIntent);
1916             }
1917
1918             // Consume the event.
1919             return true;
1920         } else if (menuItemId == R.id.ad_consent) {  // Ad consent.
1921             // Instantiate the ad consent dialog.
1922             DialogFragment adConsentDialogFragment = new AdConsentDialog();
1923
1924             // Display the ad consent dialog.
1925             adConsentDialogFragment.show(getSupportFragmentManager(), getString(R.string.ad_consent));
1926
1927             // Consume the event.
1928             return true;
1929         } else {  // There is no match with the options menu.  Pass the event up to the parent method.
1930             // Don't consume the event.
1931             return super.onOptionsItemSelected(menuItem);
1932         }
1933     }
1934
1935     // removeAllCookies is deprecated, but it is required for API < 21.
1936     @Override
1937     public boolean onNavigationItemSelected(@NonNull MenuItem menuItem) {
1938         // Get a handle for the shared preferences.
1939         SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(this);
1940
1941         // Get the menu item ID.
1942         int menuItemId = menuItem.getItemId();
1943
1944         // Run the commands that correspond to the selected menu item.
1945         if (menuItemId == R.id.clear_and_exit) {  // Clear and exit.
1946             // Clear and exit Privacy Browser.
1947             clearAndExit();
1948         } else if (menuItemId == R.id.home) {  // Home.
1949             // Load the homepage.
1950             loadUrl(currentWebView, sharedPreferences.getString("homepage", getString(R.string.homepage_default_value)));
1951         } else if (menuItemId == R.id.back) {  // Back.
1952             // Check if the WebView can go back.
1953             if (currentWebView.canGoBack()) {
1954                 // Get the current web back forward list.
1955                 WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
1956
1957                 // Get the previous entry URL.
1958                 String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
1959
1960                 // Apply the domain settings.
1961                 applyDomainSettings(currentWebView, previousUrl, false, false, false);
1962
1963                 // Load the previous website in the history.
1964                 currentWebView.goBack();
1965             }
1966         } else if (menuItemId == R.id.forward) {  // Forward.
1967             // Check if the WebView can go forward.
1968             if (currentWebView.canGoForward()) {
1969                 // Get the current web back forward list.
1970                 WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
1971
1972                 // Get the next entry URL.
1973                 String nextUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() + 1).getUrl();
1974
1975                 // Apply the domain settings.
1976                 applyDomainSettings(currentWebView, nextUrl, false, false, false);
1977
1978                 // Load the next website in the history.
1979                 currentWebView.goForward();
1980             }
1981         } else if (menuItemId == R.id.history) {  // History.
1982             // Instantiate the URL history dialog.
1983             DialogFragment urlHistoryDialogFragment = UrlHistoryDialog.loadBackForwardList(currentWebView.getWebViewFragmentId());
1984
1985             // Show the URL history dialog.
1986             urlHistoryDialogFragment.show(getSupportFragmentManager(), getString(R.string.history));
1987         } else if (menuItemId == R.id.open) {  // Open.
1988             // Instantiate the open file dialog.
1989             DialogFragment openDialogFragment = new OpenDialog();
1990
1991             // Show the open file dialog.
1992             openDialogFragment.show(getSupportFragmentManager(), getString(R.string.open));
1993         } else if (menuItemId == R.id.requests) {  // Requests.
1994             // Populate the resource requests.
1995             RequestsActivity.resourceRequests = currentWebView.getResourceRequests();
1996
1997             // Create an intent to launch the Requests activity.
1998             Intent requestsIntent = new Intent(this, RequestsActivity.class);
1999
2000             // Add the block third-party requests status to the intent.
2001             requestsIntent.putExtra("block_all_third_party_requests", currentWebView.isBlocklistEnabled(NestedScrollWebView.THIRD_PARTY_REQUESTS));
2002
2003             // Make it so.
2004             startActivity(requestsIntent);
2005         } else if (menuItemId == R.id.downloads) {  // Downloads.
2006             // Try the default system download manager.
2007             try {
2008                 // Launch the default system Download Manager.
2009                 Intent defaultDownloadManagerIntent = new Intent(DownloadManager.ACTION_VIEW_DOWNLOADS);
2010
2011                 // Launch as a new task so that the download manager and Privacy Browser show as separate windows in the recent tasks list.
2012                 defaultDownloadManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2013
2014                 // Make it so.
2015                 startActivity(defaultDownloadManagerIntent);
2016             } catch (Exception defaultDownloadManagerException) {
2017                 // Try a generic file manager.
2018                 try {
2019                     // Create a generic file manager intent.
2020                     Intent genericFileManagerIntent = new Intent(Intent.ACTION_VIEW);
2021
2022                     // Open the download directory.
2023                     genericFileManagerIntent.setDataAndType(Uri.parse(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString()), DocumentsContract.Document.MIME_TYPE_DIR);
2024
2025                     // Launch as a new task so that the file manager and Privacy Browser show as separate windows in the recent tasks list.
2026                     genericFileManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2027
2028                     // Make it so.
2029                     startActivity(genericFileManagerIntent);
2030                 } catch (Exception genericFileManagerException) {
2031                     // Try an alternate file manager.
2032                     try {
2033                         // Create an alternate file manager intent.
2034                         Intent alternateFileManagerIntent = new Intent(Intent.ACTION_VIEW);
2035
2036                         // Open the download directory.
2037                         alternateFileManagerIntent.setDataAndType(Uri.parse(Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS).toString()), "resource/folder");
2038
2039                         // Launch as a new task so that the file manager and Privacy Browser show as separate windows in the recent tasks list.
2040                         alternateFileManagerIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2041
2042                         // Open the alternate file manager.
2043                         startActivity(alternateFileManagerIntent);
2044                     } catch (Exception alternateFileManagerException) {
2045                         // Display a snackbar.
2046                         Snackbar.make(currentWebView, R.string.no_file_manager_detected, Snackbar.LENGTH_INDEFINITE).show();
2047                     }
2048                 }
2049             }
2050         } else if (menuItemId == R.id.domains) {  // Domains.
2051             // Set the flag to reapply the domain settings on restart when returning from Domain Settings.
2052             reapplyDomainSettingsOnRestart = true;
2053
2054             // Launch the domains activity.
2055             Intent domainsIntent = new Intent(this, DomainsActivity.class);
2056
2057             // Add the extra information to the intent.
2058             domainsIntent.putExtra("current_url", currentWebView.getUrl());
2059
2060             // Get the current certificate.
2061             SslCertificate sslCertificate = currentWebView.getCertificate();
2062
2063             // Check to see if the SSL certificate is populated.
2064             if (sslCertificate != null) {
2065                 // Extract the certificate to strings.
2066                 String issuedToCName = sslCertificate.getIssuedTo().getCName();
2067                 String issuedToOName = sslCertificate.getIssuedTo().getOName();
2068                 String issuedToUName = sslCertificate.getIssuedTo().getUName();
2069                 String issuedByCName = sslCertificate.getIssuedBy().getCName();
2070                 String issuedByOName = sslCertificate.getIssuedBy().getOName();
2071                 String issuedByUName = sslCertificate.getIssuedBy().getUName();
2072                 long startDateLong = sslCertificate.getValidNotBeforeDate().getTime();
2073                 long endDateLong = sslCertificate.getValidNotAfterDate().getTime();
2074
2075                 // Add the certificate to the intent.
2076                 domainsIntent.putExtra("ssl_issued_to_cname", issuedToCName);
2077                 domainsIntent.putExtra("ssl_issued_to_oname", issuedToOName);
2078                 domainsIntent.putExtra("ssl_issued_to_uname", issuedToUName);
2079                 domainsIntent.putExtra("ssl_issued_by_cname", issuedByCName);
2080                 domainsIntent.putExtra("ssl_issued_by_oname", issuedByOName);
2081                 domainsIntent.putExtra("ssl_issued_by_uname", issuedByUName);
2082                 domainsIntent.putExtra("ssl_start_date", startDateLong);
2083                 domainsIntent.putExtra("ssl_end_date", endDateLong);
2084             }
2085
2086             // Check to see if the current IP addresses have been received.
2087             if (currentWebView.hasCurrentIpAddresses()) {
2088                 // Add the current IP addresses to the intent.
2089                 domainsIntent.putExtra("current_ip_addresses", currentWebView.getCurrentIpAddresses());
2090             }
2091
2092             // Make it so.
2093             startActivity(domainsIntent);
2094         } else if (menuItemId == R.id.settings) {  // Settings.
2095             // Set the flag to reapply app settings on restart when returning from Settings.
2096             reapplyAppSettingsOnRestart = true;
2097
2098             // Set the flag to reapply the domain settings on restart when returning from Settings.
2099             reapplyDomainSettingsOnRestart = true;
2100
2101             // Launch the settings activity.
2102             Intent settingsIntent = new Intent(this, SettingsActivity.class);
2103             startActivity(settingsIntent);
2104         } else if (menuItemId == R.id.import_export) { // Import/Export.
2105             // Create an intent to launch the import/export activity.
2106             Intent importExportIntent = new Intent(this, ImportExportActivity.class);
2107
2108             // Make it so.
2109             startActivity(importExportIntent);
2110         } else if (menuItemId == R.id.logcat) {  // Logcat.
2111             // Create an intent to launch the logcat activity.
2112             Intent logcatIntent = new Intent(this, LogcatActivity.class);
2113
2114             // Make it so.
2115             startActivity(logcatIntent);
2116         } else if (menuItemId == R.id.guide) {  // Guide.
2117             // Create an intent to launch the guide activity.
2118             Intent guideIntent = new Intent(this, GuideActivity.class);
2119
2120             // Make it so.
2121             startActivity(guideIntent);
2122         } else if (menuItemId == R.id.about) {  // About
2123             // Create an intent to launch the about activity.
2124             Intent aboutIntent = new Intent(this, AboutActivity.class);
2125
2126             // Create a string array for the blocklist versions.
2127             String[] blocklistVersions = new String[]{easyList.get(0).get(0)[0], easyPrivacy.get(0).get(0)[0], fanboysAnnoyanceList.get(0).get(0)[0], fanboysSocialList.get(0).get(0)[0],
2128                     ultraList.get(0).get(0)[0], ultraPrivacy.get(0).get(0)[0]};
2129
2130             // Add the blocklist versions to the intent.
2131             aboutIntent.putExtra(AboutActivity.BLOCKLIST_VERSIONS, blocklistVersions);
2132
2133             // Make it so.
2134             startActivity(aboutIntent);
2135         }
2136
2137         // Close the navigation drawer.
2138         drawerLayout.closeDrawer(GravityCompat.START);
2139         return true;
2140     }
2141
2142     @Override
2143     public void onPostCreate(Bundle savedInstanceState) {
2144         // Run the default commands.
2145         super.onPostCreate(savedInstanceState);
2146
2147         // Sync the state of the DrawerToggle after the default `onRestoreInstanceState()` has finished.  This creates the navigation drawer icon.
2148         actionBarDrawerToggle.syncState();
2149     }
2150
2151     @Override
2152     public void onConfigurationChanged(@NonNull Configuration newConfig) {
2153         // Run the default commands.
2154         super.onConfigurationChanged(newConfig);
2155
2156         // Reload the ad for the free flavor if not in full screen mode.
2157         if (BuildConfig.FLAVOR.contentEquals("free") && !inFullScreenBrowsingMode) {
2158             // Get a handle for the ad view.  This cannot be a class variable because it changes with each ad load.
2159             View adView = findViewById(R.id.adview);
2160
2161             // Reload the ad.  The AdView is destroyed and recreated, which changes the ID, every time it is reloaded to handle possible rotations.
2162             // `getContext()` can be used instead of `getActivity.getApplicationContext()` once the minimum API >= 23.
2163             AdHelper.loadAd(adView, getApplicationContext(), this, getString(R.string.ad_unit_id));
2164         }
2165
2166         // `invalidateOptionsMenu` should recalculate the number of action buttons from the menu to display on the app bar, but it doesn't because of the this bug:
2167         // https://code.google.com/p/android/issues/detail?id=20493#c8
2168         // ActivityCompat.invalidateOptionsMenu(this);
2169     }
2170
2171     @Override
2172     public void onCreateContextMenu(ContextMenu menu, View view, ContextMenu.ContextMenuInfo menuInfo) {
2173         // Get the hit test result.
2174         final WebView.HitTestResult hitTestResult = currentWebView.getHitTestResult();
2175
2176         // Define the URL strings.
2177         final String imageUrl;
2178         final String linkUrl;
2179
2180         // Get handles for the system managers.
2181         final ClipboardManager clipboardManager = (ClipboardManager) getSystemService(CLIPBOARD_SERVICE);
2182
2183         // Remove the lint errors below that the clipboard manager might be null.
2184         assert clipboardManager != null;
2185
2186         // Process the link according to the type.
2187         switch (hitTestResult.getType()) {
2188             // `SRC_ANCHOR_TYPE` is a link.
2189             case WebView.HitTestResult.SRC_ANCHOR_TYPE:
2190                 // Get the target URL.
2191                 linkUrl = hitTestResult.getExtra();
2192
2193                 // Set the target URL as the title of the `ContextMenu`.
2194                 menu.setHeaderTitle(linkUrl);
2195
2196                 // Add an Open in New Tab entry.
2197                 menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2198                     // Load the link URL in a new tab and move to it.
2199                     addNewTab(linkUrl, true);
2200
2201                     // Consume the event.
2202                     return true;
2203                 });
2204
2205                 // Add an Open in Background entry.
2206                 menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
2207                     // Load the link URL in a new tab but do not move to it.
2208                     addNewTab(linkUrl, false);
2209
2210                     // Consume the event.
2211                     return true;
2212                 });
2213
2214                 // Add an Open with App entry.
2215                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2216                     openWithApp(linkUrl);
2217
2218                     // Consume the event.
2219                     return true;
2220                 });
2221
2222                 // Add an Open with Browser entry.
2223                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2224                     openWithBrowser(linkUrl);
2225
2226                     // Consume the event.
2227                     return true;
2228                 });
2229
2230                 // Add a Copy URL entry.
2231                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2232                     // Save the link URL in a `ClipData`.
2233                     ClipData srcAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
2234
2235                     // Set the `ClipData` as the clipboard's primary clip.
2236                     clipboardManager.setPrimaryClip(srcAnchorTypeClipData);
2237
2238                     // Consume the event.
2239                     return true;
2240                 });
2241
2242                 // Add a Save URL entry.
2243                 menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
2244                     // Check the download preference.
2245                     if (downloadWithExternalApp) {  // Download with an external app.
2246                         downloadUrlWithExternalApp(linkUrl);
2247                     } else {  // Handle the download inside of Privacy Browser.
2248                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2249                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2250                                 currentWebView.getAcceptCookies()).execute(linkUrl);
2251                     }
2252
2253                     // Consume the event.
2254                     return true;
2255                 });
2256
2257                 // Add an empty Cancel entry, which by default closes the context menu.
2258                 menu.add(R.string.cancel);
2259                 break;
2260
2261             // `IMAGE_TYPE` is an image.
2262             case WebView.HitTestResult.IMAGE_TYPE:
2263                 // Get the image URL.
2264                 imageUrl = hitTestResult.getExtra();
2265
2266                 // Remove the incorrect lint warning below that the image URL might be null.
2267                 assert imageUrl != null;
2268
2269                 // Set the context menu title.
2270                 if (imageUrl.startsWith("data:")) {  // The image data is contained in within the URL, making it exceedingly long.
2271                     // Truncate the image URL before making it the title.
2272                     menu.setHeaderTitle(imageUrl.substring(0, 100));
2273                 } else {  // The image URL does not contain the full image data.
2274                     // Set the image URL as the title of the context menu.
2275                     menu.setHeaderTitle(imageUrl);
2276                 }
2277
2278                 // Add an Open in New Tab entry.
2279                 menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2280                     // Load the image in a new tab.
2281                     addNewTab(imageUrl, true);
2282
2283                     // Consume the event.
2284                     return true;
2285                 });
2286
2287                 // Add an Open with App entry.
2288                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2289                     // Open the image URL with an external app.
2290                     openWithApp(imageUrl);
2291
2292                     // Consume the event.
2293                     return true;
2294                 });
2295
2296                 // Add an Open with Browser entry.
2297                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2298                     // Open the image URL with an external browser.
2299                     openWithBrowser(imageUrl);
2300
2301                     // Consume the event.
2302                     return true;
2303                 });
2304
2305                 // Add a View Image entry.
2306                 menu.add(R.string.view_image).setOnMenuItemClickListener(item -> {
2307                     // Load the image in the current tab.
2308                     loadUrl(currentWebView, imageUrl);
2309
2310                     // Consume the event.
2311                     return true;
2312                 });
2313
2314                 // Add a Save Image entry.
2315                 menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
2316                     // Check the download preference.
2317                     if (downloadWithExternalApp) {  // Download with an external app.
2318                         downloadUrlWithExternalApp(imageUrl);
2319                     } else {  // Handle the download inside of Privacy Browser.
2320                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2321                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2322                                 currentWebView.getAcceptCookies()).execute(imageUrl);
2323                     }
2324
2325                     // Consume the event.
2326                     return true;
2327                 });
2328
2329                 // Add a Copy URL entry.
2330                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2331                     // Save the image URL in a clip data.
2332                     ClipData imageTypeClipData = ClipData.newPlainText(getString(R.string.url), imageUrl);
2333
2334                     // Set the clip data as the clipboard's primary clip.
2335                     clipboardManager.setPrimaryClip(imageTypeClipData);
2336
2337                     // Consume the event.
2338                     return true;
2339                 });
2340
2341                 // Add an empty Cancel entry, which by default closes the context menu.
2342                 menu.add(R.string.cancel);
2343                 break;
2344
2345             // `SRC_IMAGE_ANCHOR_TYPE` is an image that is also a link.
2346             case WebView.HitTestResult.SRC_IMAGE_ANCHOR_TYPE:
2347                 // Get the image URL.
2348                 imageUrl = hitTestResult.getExtra();
2349
2350                 // Instantiate a handler.
2351                 Handler handler = new Handler();
2352
2353                 // Get a message from the handler.
2354                 Message message = handler.obtainMessage();
2355
2356                 // Request the image details from the last touched node be returned in the message.
2357                 currentWebView.requestFocusNodeHref(message);
2358
2359                 // Get the link URL from the message data.
2360                 linkUrl = message.getData().getString("url");
2361
2362                 // Set the link URL as the title of the context menu.
2363                 menu.setHeaderTitle(linkUrl);
2364
2365                 // Add an Open in New Tab entry.
2366                 menu.add(R.string.open_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2367                     // Load the link URL in a new tab and move to it.
2368                     addNewTab(linkUrl, true);
2369
2370                     // Consume the event.
2371                     return true;
2372                 });
2373
2374                 // Add an Open in Background entry.
2375                 menu.add(R.string.open_in_background).setOnMenuItemClickListener((MenuItem item) -> {
2376                     // Lod the link URL in a new tab but do not move to it.
2377                     addNewTab(linkUrl, false);
2378
2379                     // Consume the event.
2380                     return true;
2381                 });
2382
2383                 // Add an Open Image in New Tab entry.
2384                 menu.add(R.string.open_image_in_new_tab).setOnMenuItemClickListener((MenuItem item) -> {
2385                     // Load the image in a new tab and move to it.
2386                     addNewTab(imageUrl, true);
2387
2388                     // Consume the event.
2389                     return true;
2390                 });
2391
2392                 // Add an Open with App entry.
2393                 menu.add(R.string.open_with_app).setOnMenuItemClickListener((MenuItem item) -> {
2394                     // Open the link URL with an external app.
2395                     openWithApp(linkUrl);
2396
2397                     // Consume the event.
2398                     return true;
2399                 });
2400
2401                 // Add an Open with Browser entry.
2402                 menu.add(R.string.open_with_browser).setOnMenuItemClickListener((MenuItem item) -> {
2403                     // Open the link URL with an external browser.
2404                     openWithBrowser(linkUrl);
2405
2406                     // Consume the event.
2407                     return true;
2408                 });
2409
2410                 // Add a View Image entry.
2411                 menu.add(R.string.view_image).setOnMenuItemClickListener((MenuItem item) -> {
2412                    // View the image in the current tab.
2413                    loadUrl(currentWebView, imageUrl);
2414
2415                    // Consume the event.
2416                    return true;
2417                 });
2418
2419                 // Add a Save Image entry.
2420                 menu.add(R.string.save_image).setOnMenuItemClickListener((MenuItem item) -> {
2421                     // Check the download preference.
2422                     if (downloadWithExternalApp) {  // Download with an external app.
2423                         downloadUrlWithExternalApp(imageUrl);
2424                     } else {  // Handle the download inside of Privacy Browser.
2425                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2426                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2427                                 currentWebView.getAcceptCookies()).execute(imageUrl);
2428                     }
2429
2430                     // Consume the event.
2431                     return true;
2432                 });
2433
2434                 // Add a Copy URL entry.
2435                 menu.add(R.string.copy_url).setOnMenuItemClickListener((MenuItem item) -> {
2436                     // Save the link URL in a clip data.
2437                     ClipData srcImageAnchorTypeClipData = ClipData.newPlainText(getString(R.string.url), linkUrl);
2438
2439                     // Set the clip data as the clipboard's primary clip.
2440                     clipboardManager.setPrimaryClip(srcImageAnchorTypeClipData);
2441
2442                     // Consume the event.
2443                     return true;
2444                 });
2445
2446                 // Add a Save URL entry.
2447                 menu.add(R.string.save_url).setOnMenuItemClickListener((MenuItem item) -> {
2448                     // Check the download preference.
2449                     if (downloadWithExternalApp) {  // Download with an external app.
2450                         downloadUrlWithExternalApp(linkUrl);
2451                     } else {  // Handle the download inside of Privacy Browser.
2452                         // Prepare the save dialog.  The dialog will be displayed once the file size and the content disposition have been acquired.
2453                         new PrepareSaveDialog(this, this, getSupportFragmentManager(), SaveWebpageDialog.SAVE_URL, currentWebView.getSettings().getUserAgentString(),
2454                                 currentWebView.getAcceptCookies()).execute(linkUrl);
2455                     }
2456
2457                     // Consume the event.
2458                     return true;
2459                 });
2460
2461                 // Add an empty Cancel entry, which by default closes the context menu.
2462                 menu.add(R.string.cancel);
2463                 break;
2464
2465             case WebView.HitTestResult.EMAIL_TYPE:
2466                 // Get the target URL.
2467                 linkUrl = hitTestResult.getExtra();
2468
2469                 // Set the target URL as the title of the `ContextMenu`.
2470                 menu.setHeaderTitle(linkUrl);
2471
2472                 // Add a Write Email entry.
2473                 menu.add(R.string.write_email).setOnMenuItemClickListener(item -> {
2474                     // Use `ACTION_SENDTO` instead of `ACTION_SEND` so that only email programs are launched.
2475                     Intent emailIntent = new Intent(Intent.ACTION_SENDTO);
2476
2477                     // Parse the url and set it as the data for the `Intent`.
2478                     emailIntent.setData(Uri.parse("mailto:" + linkUrl));
2479
2480                     // `FLAG_ACTIVITY_NEW_TASK` opens the email program in a new task instead as part of Privacy Browser.
2481                     emailIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
2482
2483                     try {
2484                         // Make it so.
2485                         startActivity(emailIntent);
2486                     } catch (ActivityNotFoundException exception) {
2487                         // Display a snackbar.
2488                         Snackbar.make(currentWebView, getString(R.string.error) + "  " + exception, Snackbar.LENGTH_INDEFINITE).show();
2489                     }
2490
2491                     // Consume the event.
2492                     return true;
2493                 });
2494
2495                 // Add a Copy Email Address entry.
2496                 menu.add(R.string.copy_email_address).setOnMenuItemClickListener(item -> {
2497                     // Save the email address in a `ClipData`.
2498                     ClipData srcEmailTypeClipData = ClipData.newPlainText(getString(R.string.email_address), linkUrl);
2499
2500                     // Set the `ClipData` as the clipboard's primary clip.
2501                     clipboardManager.setPrimaryClip(srcEmailTypeClipData);
2502
2503                     // Consume the event.
2504                     return true;
2505                 });
2506
2507                 // Add an empty Cancel entry, which by default closes the context menu.
2508                 menu.add(R.string.cancel);
2509                 break;
2510         }
2511     }
2512
2513     @Override
2514     public void onCreateBookmark(DialogFragment dialogFragment, Bitmap favoriteIconBitmap) {
2515         // Get a handle for the bookmarks list view.
2516         ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
2517
2518         // Get the dialog.
2519         Dialog dialog = dialogFragment.getDialog();
2520
2521         // Remove the incorrect lint warning below that the dialog might be null.
2522         assert dialog != null;
2523
2524         // Get the views from the dialog fragment.
2525         EditText createBookmarkNameEditText = dialog.findViewById(R.id.create_bookmark_name_edittext);
2526         EditText createBookmarkUrlEditText = dialog.findViewById(R.id.create_bookmark_url_edittext);
2527
2528         // Extract the strings from the edit texts.
2529         String bookmarkNameString = createBookmarkNameEditText.getText().toString();
2530         String bookmarkUrlString = createBookmarkUrlEditText.getText().toString();
2531
2532         // Create a favorite icon byte array output stream.
2533         ByteArrayOutputStream favoriteIconByteArrayOutputStream = new ByteArrayOutputStream();
2534
2535         // Convert the favorite icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2536         favoriteIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, favoriteIconByteArrayOutputStream);
2537
2538         // Convert the favorite icon byte array stream to a byte array.
2539         byte[] favoriteIconByteArray = favoriteIconByteArrayOutputStream.toByteArray();
2540
2541         // Display the new bookmark below the current items in the (0 indexed) list.
2542         int newBookmarkDisplayOrder = bookmarksListView.getCount();
2543
2544         // Create the bookmark.
2545         bookmarksDatabaseHelper.createBookmark(bookmarkNameString, bookmarkUrlString, currentBookmarksFolder, newBookmarkDisplayOrder, favoriteIconByteArray);
2546
2547         // Update the bookmarks cursor with the current contents of this folder.
2548         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2549
2550         // Update the list view.
2551         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2552
2553         // Scroll to the new bookmark.
2554         bookmarksListView.setSelection(newBookmarkDisplayOrder);
2555     }
2556
2557     @Override
2558     public void onCreateBookmarkFolder(DialogFragment dialogFragment, @NonNull Bitmap favoriteIconBitmap) {
2559         // Get a handle for the bookmarks list view.
2560         ListView bookmarksListView = findViewById(R.id.bookmarks_drawer_listview);
2561
2562         // Get the dialog.
2563         Dialog dialog = dialogFragment.getDialog();
2564
2565         // Remove the incorrect lint warning below that the dialog might be null.
2566         assert dialog != null;
2567
2568         // Get handles for the views in the dialog fragment.
2569         EditText folderNameEditText = dialog.findViewById(R.id.folder_name_edittext);
2570         RadioButton defaultIconRadioButton = dialog.findViewById(R.id.default_icon_radiobutton);
2571         ImageView defaultIconImageView = dialog.findViewById(R.id.default_icon_imageview);
2572
2573         // Get new folder name string.
2574         String folderNameString = folderNameEditText.getText().toString();
2575
2576         // Create a folder icon bitmap.
2577         Bitmap folderIconBitmap;
2578
2579         // Set the folder icon bitmap according to the dialog.
2580         if (defaultIconRadioButton.isChecked()) {  // Use the default folder icon.
2581             // Get the default folder icon drawable.
2582             Drawable folderIconDrawable = defaultIconImageView.getDrawable();
2583
2584             // Convert the folder icon drawable to a bitmap drawable.
2585             BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2586
2587             // Convert the folder icon bitmap drawable to a bitmap.
2588             folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2589         } else {  // Use the WebView favorite icon.
2590             // Copy the favorite icon bitmap to the folder icon bitmap.
2591             folderIconBitmap = favoriteIconBitmap;
2592         }
2593
2594         // Create a folder icon byte array output stream.
2595         ByteArrayOutputStream folderIconByteArrayOutputStream = new ByteArrayOutputStream();
2596
2597         // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2598         folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, folderIconByteArrayOutputStream);
2599
2600         // Convert the folder icon byte array stream to a byte array.
2601         byte[] folderIconByteArray = folderIconByteArrayOutputStream.toByteArray();
2602
2603         // Move all the bookmarks down one in the display order.
2604         for (int i = 0; i < bookmarksListView.getCount(); i++) {
2605             int databaseId = (int) bookmarksListView.getItemIdAtPosition(i);
2606             bookmarksDatabaseHelper.updateDisplayOrder(databaseId, i + 1);
2607         }
2608
2609         // Create the folder, which will be placed at the top of the `ListView`.
2610         bookmarksDatabaseHelper.createFolder(folderNameString, currentBookmarksFolder, folderIconByteArray);
2611
2612         // Update the bookmarks cursor with the current contents of this folder.
2613         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2614
2615         // Update the `ListView`.
2616         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2617
2618         // Scroll to the new folder.
2619         bookmarksListView.setSelection(0);
2620     }
2621
2622     @Override
2623     public void onSaveBookmarkFolder(DialogFragment dialogFragment, int selectedFolderDatabaseId, @NonNull Bitmap favoriteIconBitmap) {
2624         // Remove the incorrect lint warning below that the dialog fragment might be null.
2625         assert dialogFragment != null;
2626
2627         // Get the dialog.
2628         Dialog dialog = dialogFragment.getDialog();
2629
2630         // Remove the incorrect lint warning below that the dialog might be null.
2631         assert dialog != null;
2632
2633         // Get handles for the views from the dialog.
2634         RadioButton currentFolderIconRadioButton = dialog.findViewById(R.id.current_icon_radiobutton);
2635         RadioButton defaultFolderIconRadioButton = dialog.findViewById(R.id.default_icon_radiobutton);
2636         ImageView defaultFolderIconImageView = dialog.findViewById(R.id.default_icon_imageview);
2637         EditText editFolderNameEditText = dialog.findViewById(R.id.folder_name_edittext);
2638
2639         // Get the new folder name.
2640         String newFolderNameString = editFolderNameEditText.getText().toString();
2641
2642         // Check if the favorite icon has changed.
2643         if (currentFolderIconRadioButton.isChecked()) {  // Only the name has changed.
2644             // Update the name in the database.
2645             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString);
2646         } else if (!currentFolderIconRadioButton.isChecked() && newFolderNameString.equals(oldFolderNameString)) {  // Only the icon has changed.
2647             // Create the new folder icon Bitmap.
2648             Bitmap folderIconBitmap;
2649
2650             // Populate the new folder icon bitmap.
2651             if (defaultFolderIconRadioButton.isChecked()) {
2652                 // Get the default folder icon drawable.
2653                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
2654
2655                 // Convert the folder icon drawable to a bitmap drawable.
2656                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2657
2658                 // Convert the folder icon bitmap drawable to a bitmap.
2659                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2660             } else {  // Use the `WebView` favorite icon.
2661                 // Copy the favorite icon bitmap to the folder icon bitmap.
2662                 folderIconBitmap = favoriteIconBitmap;
2663             }
2664
2665             // Create a folder icon byte array output stream.
2666             ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
2667
2668             // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2669             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
2670
2671             // Convert the folder icon byte array stream to a byte array.
2672             byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
2673
2674             // Update the folder icon in the database.
2675             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, newFolderIconByteArray);
2676         } else {  // The folder icon and the name have changed.
2677             // Get the new folder icon bitmap.
2678             Bitmap folderIconBitmap;
2679             if (defaultFolderIconRadioButton.isChecked()) {
2680                 // Get the default folder icon drawable.
2681                 Drawable folderIconDrawable = defaultFolderIconImageView.getDrawable();
2682
2683                 // Convert the folder icon drawable to a bitmap drawable.
2684                 BitmapDrawable folderIconBitmapDrawable = (BitmapDrawable) folderIconDrawable;
2685
2686                 // Convert the folder icon bitmap drawable to a bitmap.
2687                 folderIconBitmap = folderIconBitmapDrawable.getBitmap();
2688             } else {  // Use the `WebView` favorite icon.
2689                 // Copy the favorite icon bitmap to the folder icon bitmap.
2690                 folderIconBitmap = favoriteIconBitmap;
2691             }
2692
2693             // Create a folder icon byte array output stream.
2694             ByteArrayOutputStream newFolderIconByteArrayOutputStream = new ByteArrayOutputStream();
2695
2696             // Convert the folder icon bitmap to a byte array.  `0` is for lossless compression (the only option for a PNG).
2697             folderIconBitmap.compress(Bitmap.CompressFormat.PNG, 0, newFolderIconByteArrayOutputStream);
2698
2699             // Convert the folder icon byte array stream to a byte array.
2700             byte[] newFolderIconByteArray = newFolderIconByteArrayOutputStream.toByteArray();
2701
2702             // Update the folder name and icon in the database.
2703             bookmarksDatabaseHelper.updateFolder(selectedFolderDatabaseId, oldFolderNameString, newFolderNameString, newFolderIconByteArray);
2704         }
2705
2706         // Update the bookmarks cursor with the current contents of this folder.
2707         bookmarksCursor = bookmarksDatabaseHelper.getBookmarksByDisplayOrder(currentBookmarksFolder);
2708
2709         // Update the `ListView`.
2710         bookmarksCursorAdapter.changeCursor(bookmarksCursor);
2711     }
2712
2713     // Override `onBackPressed()` to handle the navigation drawer and and the WebViews.
2714     @Override
2715     public void onBackPressed() {
2716         // Check the different options for processing `back`.
2717         if (drawerLayout.isDrawerVisible(GravityCompat.START)) {  // The navigation drawer is open.
2718             // Close the navigation drawer.
2719             drawerLayout.closeDrawer(GravityCompat.START);
2720         } else if (drawerLayout.isDrawerVisible(GravityCompat.END)){  // The bookmarks drawer is open.
2721             // close the bookmarks drawer.
2722             drawerLayout.closeDrawer(GravityCompat.END);
2723         } else if (displayingFullScreenVideo) {  // A full screen video is shown.
2724             // Exit the full screen video.
2725             exitFullScreenVideo();
2726         } else if (currentWebView.canGoBack()) {  // There is at least one item in the current WebView history.
2727             // Get the current web back forward list.
2728             WebBackForwardList webBackForwardList = currentWebView.copyBackForwardList();
2729
2730             // Get the previous entry URL.
2731             String previousUrl = webBackForwardList.getItemAtIndex(webBackForwardList.getCurrentIndex() - 1).getUrl();
2732
2733             // Apply the domain settings.
2734             applyDomainSettings(currentWebView, previousUrl, false, false, false);
2735
2736             // Go back.
2737             currentWebView.goBack();
2738         } else if (tabLayout.getTabCount() > 1) {  // There are at least two tabs.
2739             // Close the current tab.
2740             closeCurrentTab();
2741         } else {  // There isn't anything to do in Privacy Browser.
2742             // Close Privacy Browser.  `finishAndRemoveTask()` also removes Privacy Browser from the recent app list.
2743             if (Build.VERSION.SDK_INT >= 21) {
2744                 finishAndRemoveTask();
2745             } else {
2746                 finish();
2747             }
2748
2749             // Manually kill Privacy Browser.  Otherwise, it is glitchy when restarted.
2750             System.exit(0);
2751         }
2752     }
2753
2754     // Process the results of a file browse.
2755     @Override
2756     public void onActivityResult(int requestCode, int resultCode, Intent returnedIntent) {
2757         // Run the default commands.
2758         super.onActivityResult(requestCode, resultCode, returnedIntent);
2759
2760         // Run the commands that correlate to the specified request code.
2761         switch (requestCode) {
2762             case BROWSE_FILE_UPLOAD_REQUEST_CODE:
2763                 // File uploads only work on API >= 21.
2764                 if (Build.VERSION.SDK_INT >= 21) {
2765                     // Pass the file to the WebView.
2766                     fileChooserCallback.onReceiveValue(WebChromeClient.FileChooserParams.parseResult(resultCode, returnedIntent));
2767                 }
2768                 break;
2769
2770             case BROWSE_OPEN_REQUEST_CODE:
2771                 // Don't do anything if the user pressed back from the file picker.
2772                 if (resultCode == Activity.RESULT_OK) {
2773                     // Get a handle for the open dialog fragment.
2774                     DialogFragment openDialogFragment = (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.open));
2775
2776                     // Only update the file name if the dialog still exists.
2777                     if (openDialogFragment != null) {
2778                         // Get a handle for the open dialog.
2779                         Dialog openDialog = openDialogFragment.getDialog();
2780
2781                         // Remove the incorrect lint warning below that the dialog might be null.
2782                         assert openDialog != null;
2783
2784                         // Get a handle for the file name edit text.
2785                         EditText fileNameEditText = openDialog.findViewById(R.id.file_name_edittext);
2786
2787                         // Get the file name URI from the intent.
2788                         Uri fileNameUri = returnedIntent.getData();
2789
2790                         // Get the file name string from the URI.
2791                         String fileNameString = fileNameUri.toString();
2792
2793                         // Set the file name text.
2794                         fileNameEditText.setText(fileNameString);
2795
2796                         // Move the cursor to the end of the file name edit text.
2797                         fileNameEditText.setSelection(fileNameString.length());
2798                     }
2799                 }
2800                 break;
2801
2802             case BROWSE_SAVE_WEBPAGE_REQUEST_CODE:
2803                 // Don't do anything if the user pressed back from the file picker.
2804                 if (resultCode == Activity.RESULT_OK) {
2805                     // Get a handle for the save dialog fragment.
2806                     DialogFragment saveWebpageDialogFragment = (DialogFragment) getSupportFragmentManager().findFragmentByTag(getString(R.string.save_dialog));
2807
2808                     // Only update the file name if the dialog still exists.
2809                     if (saveWebpageDialogFragment != null) {
2810                         // Get a handle for the save webpage dialog.
2811                         Dialog saveWebpageDialog = saveWebpageDialogFragment.getDialog();
2812
2813                         // Remove the incorrect lint warning below that the dialog might be null.
2814                         assert saveWebpageDialog != null;
2815
2816                         // Get a handle for the file name edit text.
2817                         EditText fileNameEditText = saveWebpageDialog.findViewById(R.id.file_name_edittext);
2818
2819                         // Get the file name URI from the intent.
2820                         Uri fileNameUri = returnedIntent.getData();
2821
2822                         // Get the file name string from the URI.
2823                         String fileNameString = fileNameUri.toString();
2824
2825                         // Set the file name text.
2826                         fileNameEditText.setText(fileNameString);
2827
2828                         // Move the cursor to the end of the file name edit text.
2829                         fileNameEditText.setSelection(fileNameString.length());
2830                     }
2831                 }
2832                 break;
2833         }
2834     }
2835
2836     private void loadUrlFromTextBox() {
2837         // Get the text from urlTextBox and convert it to a string.  trim() removes white spaces from the beginning and end of the string.
2838         String unformattedUrlString = urlEditText.getText().toString().trim();
2839
2840         // Initialize the formatted URL string.
2841         String url = "";
2842
2843         // Check to see if `unformattedUrlString` is a valid URL.  Otherwise, convert it into a search.
2844         if (unformattedUrlString.startsWith("content://")) {  // This is a Content URL.
2845             // Load the entire content URL.
2846             url = unformattedUrlString;
2847         } else if (Patterns.WEB_URL.matcher(unformattedUrlString).matches() || unformattedUrlString.startsWith("http://") || unformattedUrlString.startsWith("https://") ||
2848                 unformattedUrlString.startsWith("file://")) {  // This is a standard URL.
2849             // Add `https://` at the beginning if there is no protocol.  Otherwise the app will segfault.
2850             if (!unformattedUrlString.startsWith("http") && !unformattedUrlString.startsWith("file://") && !unformattedUrlString.startsWith("content://")) {
2851                 unformattedUrlString = "https://" + unformattedUrlString;
2852             }
2853
2854             // Initialize `unformattedUrl`.
2855             URL unformattedUrl = null;
2856
2857             // Convert `unformattedUrlString` to a `URL`, then to a `URI`, and then back to a `String`, which sanitizes the input and adds in any missing components.
2858             try {
2859                 unformattedUrl = new URL(unformattedUrlString);
2860             } catch (MalformedURLException e) {
2861                 e.printStackTrace();
2862             }
2863
2864             // The ternary operator (? :) makes sure that a null pointer exception is not thrown, which would happen if `.get` was called on a `null` value.
2865             String scheme = unformattedUrl != null ? unformattedUrl.getProtocol() : null;
2866             String authority = unformattedUrl != null ? unformattedUrl.getAuthority() : null;
2867             String path = unformattedUrl != null ? unformattedUrl.getPath() : null;
2868             String query = unformattedUrl != null ? unformattedUrl.getQuery() : null;
2869             String fragment = unformattedUrl != null ? unformattedUrl.getRef() : null;
2870
2871             // Build the URI.
2872             Uri.Builder uri = new Uri.Builder();
2873             uri.scheme(scheme).authority(authority).path(path).query(query).fragment(fragment);
2874
2875             // Decode the URI as a UTF-8 string in.
2876             try {
2877                 url = URLDecoder.decode(uri.build().toString(), "UTF-8");
2878             } catch (UnsupportedEncodingException exception) {
2879                 // Do nothing.  The formatted URL string will remain blank.
2880             }
2881         } else if (!unformattedUrlString.isEmpty()){  // This is not a URL, but rather a search string.
2882             // Create an encoded URL String.
2883             String encodedUrlString;
2884
2885             // Sanitize the search input.
2886             try {
2887                 encodedUrlString = URLEncoder.encode(unformattedUrlString, "UTF-8");
2888             } catch (UnsupportedEncodingException exception) {
2889                 encodedUrlString = "";
2890             }
2891
2892             // Add the base search URL.
2893             url = searchURL + encodedUrlString;
2894         }
2895
2896         // Clear the focus from the URL edit text.  Otherwise, proximate typing in the box will retain the colorized formatting instead of being reset during refocus.
2897         urlEditText.clearFocus();
2898
2899         // Make it so.
2900         loadUrl(currentWebView, url);
2901     }
2902
2903     private void loadUrl(NestedScrollWebView nestedScrollWebView, String url) {
2904         // Sanitize the URL.
2905         url = sanitizeUrl(url);
2906
2907         // Apply the domain settings and load the URL.
2908         applyDomainSettings(nestedScrollWebView, url, true, false, true);
2909     }
2910
2911     public void findPreviousOnPage(View view) {
2912         // Go to the previous highlighted phrase on the page.  `false` goes backwards instead of forwards.
2913         currentWebView.findNext(false);
2914     }
2915
2916     public void findNextOnPage(View view) {
2917         // Go to the next highlighted phrase on the page. `true` goes forwards instead of backwards.
2918         currentWebView.findNext(true);
2919     }
2920
2921     public void closeFindOnPage(View view) {
2922         // Get a handle for the views.
2923         Toolbar toolbar = findViewById(R.id.toolbar);
2924         LinearLayout findOnPageLinearLayout = findViewById(R.id.find_on_page_linearlayout);
2925         EditText findOnPageEditText = findViewById(R.id.find_on_page_edittext);
2926
2927         // Delete the contents of `find_on_page_edittext`.
2928         findOnPageEditText.setText(null);
2929
2930         // Clear the highlighted phrases if the WebView is not null.
2931         if (currentWebView != null) {
2932             currentWebView.clearMatches();
2933         }
2934
2935         // Hide the find on page linear layout.
2936         findOnPageLinearLayout.setVisibility(View.GONE);
2937
2938         // Show the toolbar.
2939         toolbar.setVisibility(View.VISIBLE);
2940
2941         // Get a handle for the input method manager.
2942         InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE);
2943
2944         // Remove the lint warning below that the input method manager might be null.
2945         assert inputMethodManager != null;
2946
2947         // Hide the keyboard.
2948         inputMethodManager.hideSoftInputFromWindow(toolbar.getWindowToken(), 0);
2949     }
2950
2951     @Override
2952     public void onApplyNewFontSize(DialogFragment dialogFragment) {
2953         // Remove the incorrect lint warning below that the dialog fragment might be null.
2954         assert dialogFragment != null;
2955
2956         // Get the dialog.
2957       &nb